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12506: Side-Lever Morse Key, by Marconi Company, England, c. 1910 New window

12640: Induction Coil, by Marconi Company, London, c. 1906 New window

12658: Medal Institute Of Radio Engineers, by Sanford, c. 1922 New window

12772: Forward Spark 'B' Wavemeter No. 1511, by War Department, Britain, c. 1918 New window

12779: Large Switchboard Type 95, by Marconi Company, England, Early 20th Century New window

12924: Rare Portable Lifeboat Transmitter Receiver, by Marconi Company, c. 1905 New window

12938: Aircraft Wireless Telephone Type AD2, by Marconi Company, England, c. 1920 New window

13044: Assorted Components For T1154 And R1155A In Wooden Chest, England, 1940s New window

13115: Four-Second Alarm Type KM1, by Marconi Company, London, 20th Century New window

13117: Round Radio Valve Type CA, by Ediswan, London, c. 1915 New window

13172: Balloon Envelope Radio Valve, Early 20th Century New window

13183: Telephone Relay Type G, by S.G. Brown, London, c. 1908 New window

13694: Bradfield Leading-In Insulator No.1, by Marconi Company, England, 1910 New window

13774: Cover For Multiple Tuner, by Marconi Company, England, c. 1907 New window

14100: Telefunken Radio Valve Type LD15, by Telefunken, Germany, c. 1945 New window

14147: 'Marconi' Auto-Alarm Bell Type 117, by Marconi Company, England, c. 1920 New window

14183: Framed Marconi Order Slip, by Marconi Company, London, 1922 New window

14188: Brimar Radio Valve Type 6SN7GT, by Brimar, England, Mid 20th Century New window

14457: 75th Anniversary Commemorative Plate, by Ceragraphics, Devon, 1978 New window

14809: Large Main Jigger With Case, by Marconi Company, London, Early 20th Century New window

14884: Hirst Bronze Bust, by S.H. Paulon, 1936 New window

14889: Medal Portugese Marconi Company, by Joao Da Silva, Portugal, 1951 New window

14937: Bellini-Tosi Direction Finder, by Bellini & Tosi, Paris, 1907 New window

15130: RCA Radiotron Cunningham Radio Tube Type 6B7, by RCA, USA, 20th Century New window

15211: 75th Anniversary Commemorative Mug, by Ceragraphics, Devon, 1978 New window

15408: RCA Radiotron Radio Tube Type VR54, by RCA, USA, 20th Century New window

15492: Radio Valve Type ATP4, England, Mid 20th Century New window

15574: 'Cow's Tail' Insulator, Early 20th Century New window

15591: Marconi Radio Valve Type DER, by Marconi Company, London, c. 1925 New window

15771: Marconi Radio Valve Type DEV, by Marconi Company, England, c. 1923 New window

15836: Marconiphone Two-Valve Receiver Type V2, by Marconi Company, London, 1923 New window

16050: Record, by Columbia Records, London, 1920s New window

16661: Brownie Crystal Receiver No 2, by Brownie Wireless Company, Britain, c. 1925 New window

16810: Marconi Radio Valve Type DE3, by Marconi Company, London, c. 1923 New window

16862: S. E. Marchesi Marconi, by Sir Max Beerbohm, London, 1931 New window

17033: Drysdale-Tinsley Vibration Galvanometer, by H. Tinsley & Company, London, 20th Century New window

17167: RCA Radiotron Radio Tube Type 6D6 With Carton, by RCA, New Jersey, 20th Century New window

17193: Combined Switchboard Type 277 And Fuseboard Type 279, by Marconi Company, England, Early 20th Century New window

17338: Aerial Lead-In Insulator, Early 20th Century New window

17473: Early Coherer, c. 1899 New window

17579: Bank Of Six Leyden Jar Condensers, 1900 New window

17600: Decade Condenser Type 21F, by Muirhead Company, Britain, Early 20th Century New window

17841: Induction Coil, by Marconi Company, London, 1900s New window

18067: Amplifier And Detector Type 55A With Headphones, by Marconi Company, London, c. 1920 New window

18078: RCA Radiotron Cunningham Radio Tube Type 5Z3 With Carton, by RCA, New Jersey, 20th Century New window

18093: Tuning Condenser, by Marconi Company, England, c. 1915 New window

18119: Magnetic Detector, by Marconi Company, London, Early 20th Century New window

18269: Transmitter Tuner Type MC13, c. 1930 New window

18289: Magnetic Detector, by Marconi Company, London, Early 20th Century New window

18292: Facsimile Of Fleming Letter, by J.A. Fleming, London, c. 1904 New window

18465: Metal Component Pair FT-162 For Radio, 20th Century New window

18833: Mullard Radio Valve Type ORA/B, by Mullard Radio Valve Company, c. 1922 New window

18847: Marconiphone Two-Valve Receiver Type 21, by Marconiphone Company, London, 1925 New window

19011: Direct Reading Portable Decremeter, by Marconi Company, England, 1909 New window

19239: Mullard Wecovalve Radio Valve Peanut Type, by Mullard, England, c. 1920 New window

19420: Quenched Spark Disc Unit, 20th Century New window

19433: Early Experimental Coherer, c. 1902 New window

19461: Ferranti Radio Valve Type NSP1, by Ferranti, Britain, Mid 20th Century New window

19616: Triotron Radio Tube Type 6F8G With Carton, by Triotron Radio, USA?, 20th Century New window

19772: Portable Aircraft Spark Transmitter 40W, by Marconi Company, London, c. 1912 New window

19824: Marconi Radio Valve Type 42A, by Marconi Company, Italy, 20th Century New window

20091: Radio Call Sign, Early 20th Century New window

20104: Marconi Radio Valve Type MH4, by Marconi Company, England, c. 1931 New window

20141: Myers Dry Battery Radio Tube With Carton, by Myers Company, Canada, c. 1924 New window

20262: Company Seal Embosser Vulcan Foundry Ltd, Britain, 20th Century New window

20374: Emergency Quenched-Gap Transmitter Type 335, by Marconi Company, England, c. 1920 New window

20655: Marconi Radio Valve Type DEQ, by Marconi Company, England, c. 1923 New window

20679: Company Seal Embosser Fan Manufacturing Company, by Witherby Company, London, 20th Century New window

20696: Tuning Condenser No 4, by Marconi Company, England, c. 1906 New window

20731: Marconi Radio Valve Type DE3C, by Marconi Company, London, c. 1924 New window

20815: Marconi Bellini-Tosi Direction Finder, by Marconi Company, London, c. 1916 New window

20877: Morse Tape Inker, by Siemens Brothers, London, c. 1900 New window

20953: RCA Radiotron Cunningham Radio Tube Type 6B7 With Carton, by RCA, New Jersey, 20th Century New window

21300: Marconi's Oil Righi Oscillator, by Augusto Righi, Bologna, 1895 New window

21573: Marconi Crystal Receiver Type 31C, by Marconi Company, London, 1910 New window

21593: Syntoniser, by Marconi Company, London, Early 20th Century New window

21726: Replica Righi Oscillator, Late 20th Century New window

21763: 4 Volt Fleming Oscillation Valve, by Royal Ediswan, London, c. 1905 New window

21803: Fleming Valve, by Ediswan, London, c. 1905 New window

21856: Mullard Radio Valve Type PM4, by Mullard, England, 1930s New window

22068: 'Marconi' Self-Monitoring Receiver Type AD98, by Marconi Company, England, Mid 20th Century New window

22130: Company Seal Embosser Dick Kerr & Company, by Jordan & Sons, London, 20th Century New window

22136: Forward 'B' Spark Wavemeter No. 1339, by War Department, Britain, c. 1918 New window

22269: RCA Radiotron Radio Tube Type 6C6 With Carton, by RCA. USA, 20th Century New window

22293: Round Radio Valve Type N, by Ediswan, London, c. 1915 New window

22414: Ediswan Radio Valve Type ATP4 With Carton, by Ediswan, London, Mid 20th Century New window

22770: 'Marconi' Auto-Alarm Selector Type 333, by Marconi Company, London, c. 1920 New window

22875: RCA Radiotron Cunningham Radio Tube Type 5Z3 With Carton, by RCA, New Jersey, 20th Century New window

22908: Marconi-Osram Radio Valve Type R, by Marconi Company, London, c. 1923 New window

23050: Marconi Commemorative Plaque, Rome, 1912 New window

23157: Radio Valve Type ARP12, England, c. 1939 New window

23387: Two Ribbed Wooden Pillar Insulators, Early 20th Century New window

23434: Instruction Manual For The Marconi Direction Finder Type No. 6, by Sanders Phillips & Company, London, c. 1916 New window

23658: Marconi Induction Coil, by Marconi Company, London, 1899 New window

23891: Set Of Inductors Type TM1438, by Marconi Company, England, 20th Century New window

24207: Marconi Auto-Alarm Type M, by Marconi Company, England, Mid 20th Century New window

24292: Experimental Billi Condenser, c. 1900 New window

24429: Morse Key Type 100A, by Marconi Company, Britain, Early 20th Century. New window

24488: Pair Of Mounted Guard Lamps, Early 20th Century New window

24865: Experimental Round Radio Valve Type CA, by Ediswan, London, c. 1915 New window

24927: Tuning Indicator With Glass Lamp, by Marconi Company, London, Early 20th Century New window

24931: Bank Of Six Leyden Jar Condensers, 1900 New window

24996: Marconi Radio Valve Type MH4, by Marconi Company, London, 1930s New window

25048: Shunt Regulator, 20th Century New window

25098: Hytron Radio Tube Type CV1759 With Carton, by Hytron Corp., Massachusetts, 1944 New window

25157: Company Seal Embosser Coastal Radio Ltd, 20th Century New window

25217: Marconi Radio Valve Type V24, by Marconi Company, England, c. 1919 New window

25358: Cold Cathode Ray Tube, c. 1902 New window

25470: Marconi Radio Valve Type V24, by Marconi Company, England, c. 1925 New window

25691: Marconi Radio Valve Type V24, by Marconi Company, England, c. 1918 New window

25812: Ship's Wireless Spark-Gap, by Marconi Company, London, 1905 New window

26034: Cossor Radio Valve Type V10, by Cossor, England, 20th Century New window

26547: Marconi Radio Valve Type DEQ, by Marconi Company, England, c. 1923 New window

26614: GPO Radio Valve Type No 2, Britain, 20th Century New window

26677: Aerial Lead-In Insulator, Early 20th Century New window

26731: Mazda Radio Valve Type PY33 With Carton, by Mazda, England, 1960s New window

27140: Marzi Microphone, by Marzi Company, Paris, 1910 New window

27357: Marconi Radio Valve Type Q, by Ediswan, London, c. 1918 New window

27364: Mullard Wecovalve Radio Valve Peanut Type With Carton, by Mullard, England, c. 1920 New window

27556: Aerial Switch Type 272, by Marconi Company, England, Early 20th Century New window

27685: Marconi Receiver Type AD8882B, by Marconi Company, London, c. 1939 New window

27716: Illuminated Globe, by George Philip & Son Limited, London, 1971 New window

27753: Replica Grasshopper Send-Receive Morse Key, 1970s New window

27778: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

27846: Marconi Telegraph Communication Chart, by Marconi Company, London, c. 1922 New window

28052: Horn Loudspeaker Type AR19, by Graham Amplion Ltd, London, c. 1923 New window

28107: Multiple Tuner, by Marconi Company, London, c. 1907 New window

28126: Hivac Radio Valve Type CV1052, by Hivac, England, Mid 20th Century New window

28159: Tuning Condenser, by Marconi Company, England, c. 1907 New window

28254: Graduated Swivelling Coils For Triple Crystal Detector, Early 20th Century New window

28284: Marconi Crystal Receiver Type 31, by Marconi Company, London, 1910 New window

28392: Radio Receiver Type BC342N, 1940s New window

28532: High-Discrimination Communication Receiver Type Rg 44, by Marconi Company, Chelmsford, c. 1948 New window

28627: Direct Reading Portable Decremeter, by Marconi Company, London, 1909 New window

28855: Radio Valve Type ML6C, Mid 20th Century New window

29140: Large Rotary Converter, by Electric Construction Company, England, 1915 New window

29208: Ship's Transmitter Jigger, by Marconi Company, England, Early 20th Century New window

29233: Radio Valve Type ARP12, England, c. 1939 New window

29390: Marconi Radio Valve Type DEQ, by Marconi Company, England, c. 1923 New window

29505: Direction-Finding Coil For Receiver Type R1155A, by Air Ministry, c. 1940 New window

29519: Marconi Radio Valve Type V24, by Marconi Company, England, Early 20th Century New window

29821: 'Marconi' Direction Finder Type DFM2, by Marconi Company, London, c. 1927 New window

30472: RCA Radiotron Cunningham Radio Tube Type 5Z4 With Carton, by RCA, New Jersey, Mid 20th Century New window

30624: Irwin Oscillograph, by Robert W. Paul, London, Early 20th Century New window

30667: Induction Coil For Tuned Field Transmitter, by Marconi Company, London, 1907 New window

30961: National Union Radio Tube Type 12SA7GT With Carton, by National Union, New Jersey, c.1942 New window

31025: Large Emergency Morse Key, by Marconi Company, London, Early 20th Century New window

31083: Earth Arrester Plate, Early 20th Century New window

31092: Marconi's Parabolic Receiver, by Guglielmo Marconi, England, c. 1896 New window

31104: Manganin Coils Dial Bridge, by W.G. Pye & Company, Cambridge, Early 20th Century New window

31396: Marconi Radio Valve Type Q, by Ediswan, London, c. 1919 New window

31417: Puratone Rubon Radio Valve, by Puratone Rubon, Britain, 1924 New window

31421: Bust of T. L. Eckersley, by K. Scott, Late 20th Century New window

31425: American-Type Radio Tube, USA, 20th Century New window

31778: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

31810: RCA Radiotron Radio Tube Type 6D6 With Carton, by RCA, New Jersey, 20th Century New window

32039: Vertical Precision Instrument, Early 20th Century New window

32068: Generator Propellor, by Marconi Company?, 20th Century New window

32090: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

32103: Multiple Oscillator, England, c. 1898 New window

32380: Variable Pitch Generator Windmill, Early 20th Century New window

32845: Round Radio Valve Type CA, by Ediswan, London, c. 1915 New window

32919: Catalogue For Aircraft Wireless Receiver, by Marconi Company, England, c. 1921 New window

33191: Marconi Radio Valve Type Q, by Ediswan, London, c. 1916 New window

33654: Marconiphone Personal Receiver Type P17B, by Marconiphone Company, England, c. 1950 New window

33725: Company Seal Embosser Clare-Elliot Ltd, Britain, 20th Century New window

34099: Medal International Marconi Conference, by Coffredo Edginelli?, Rome, 1947 New window

34130: Marconiphone Dealer's Sign, by Marconi Company, England, Late 1920s New window

34364: Brimar Radio Valve Type 50CD6G With Carton, by Brimar, England, Mid 20th Century New window

34377: Exhibition Medal Exposition of Decorative and Modern Art, Turin, 1902 New window

34480: Philips Radio Valve Type QQE02 With Separate Carton, by Philips, Holland, Late 20th Century New window

34506: Telegraph Relay, by H.W. Sullivan, London, Early 20th Century New window

34635: Album of Direction Finder, by Marconi Company, London, c. 1916 New window

34674: Early Coherer, Chelmsford, c. 1899 New window

34701: Tuning Condenser, by Marconi Company, England, c. 1916 New window

34711: Marconi Studio Photographic Portrait, 20th Century New window

34759: 'Marconi' Auto-Alarm Buzzer Type 225, by Marconi Company, England, c. 1920 New window

35098: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

35122: Round Radio Valve Type CA, by Ediswan, London, c. 1915 New window

35206: Medal John Fritz, by V. D. Brenner, 1922 New window

35219: Bell Telephone Microphone, England, c. 1923 New window

35245: Marconi Valve Type V24, by Marconi Company, England, Early 20th Century New window

35311: Purchase Receipt For Marconi Radio Type T36 AB, by EMI, London, 1954 New window

35386: Silver Table Lighter With Case, by Alfred Foster, London, 1912 New window

35780: Ship's Direction Finder, 1920s New window

35936: Marconiphone Receiver Model 235, by Marconiphone Company, England, c. 1935 New window

35970: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

35998: Standard Resistor Type 1682, by H. Tinsley & Company, London, 20th Century New window

36479: Multiple Tuner, by Marconi Company, London, 1907 New window

36535: American-Type Radio Tube, USA, 20th Century New window

36764: Radio Valve ARP12-Type, England, Mid 20th Century New window

37413: Ladies' Silver Pocket Scent Bottle, by Charles Perry & Company, Birmingham, 1911 New window

37493: Commemarative Plate, by W. Adams & Company, England, c. 1903 New window

37590: 'Marconi' Wavemeter Type MC1, by Marconi Company, London, Early 20th Century New window

37614: Raytheon Radio Tube Type 6H6G With Carton, by Raytheon, Massachusetts, 1934 New window

37692: Bellini-Tosi Radiogoniometer, by Bellini & Tosi, Paris, c. 1907 New window

37889: Empty Case Of Forward Spark 'B' Wavemeter, by War Department, Britain, c. 1918 New window

38181: Instruction Manual For Aircraft Wireless Telephone Type AD2, by Sanders Phillips & Company, London, c. 1920 New window

38233: Two Mica Crystals, 20th Century New window

38616: Mazda Radio Valve Type CV6 With Carton, by Mazda, England, 20th Century New window

38737: 'Marconi' Crystal Wavemeter Type MC2, by Marconi Company, London, Early 20th Century New window

39208: Raytheon Radio Tube Type 6J7G, by Raytheon, USA, Mid 20th Century New window

39244: Round Radio Valve Type N, by Ediswan, London, c. 1915 New window

39440: Amplifier Type 91, by Marconi Company, London, c. 1918 New window

39443: Main Starter Switch, Early 20th Century New window

39508: Image Orthicon Tube, by English Electric, England, Mid 20th Century New window

39535: Instruction Manuals For Marconi Crystal Receiver Type 16, by Marconi Company, London, c. 1916 New window

39568: Marconi Radio Thermal Delay Switch DLS-Type, by Ediswan, London, Early 20th Century New window

39800: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

39997: Company Seal Embosser GEC Medical Equipment Ltd, Britain, 20th Century New window

40066: Rotating Multiple Stamp Holder, by E.M.R., London, 20th Century New window

40124: Marconi Receiver Type 226B, by Marconi Company, England, c. 1920 New window

40261: Lamps For Large Switchboard Type 95, England, c. 1920s New window

40275: Signal Receiver Type 57A, by Marconi Company, England, 1959 New window

40344: Replica Of Parabolic Receiver For Marconi's Original Beam System, by Marconi Company, London, 1920s/1930s New window

40357: Mullard Television Valve Type PL504 With Carton, by Mullard, Britain, 20th Century New window

40365: Mullard Wecovalve Radio Valve Peanut Type, by Mullard, England, c. 1920 New window

40508: Exhibition Medal Exposition Universelle Et Internationale, by Bonnetain, Brussels, 1935 New window

40839: Three-Position Switch, by Griffin, London, Early 20th Century New window

41092: Brimar Radio Valve Type 50CD6G, by Brimar, England, Mid 20th Century New window

41271: 'Marconi' Auto-Alarm Receiver Type 332, by Marconi Company, London, c. 1920 New window

41328: Medal Enrico Silvani, by G. Romagnoli, 1927 New window

41345: Marconi Long Wave Panel Type 229B, by Marconi Company, England, c. 1920 New window

41408: Radio Valve Type 6N7G, England, Mid 20th Century New window

41634: Tuning Condenser, Italy, c. 1907 New window

41677: Fleming Valve, by Ediswan, London, c. 1905 New window

41846: Precision Measuring Instrument With Case, by Cambridge Scientific Company, Cambridge, Early 20th Century New window

41936: Seven-Valve Receiver, by Marconi Company, London, 1920 New window

42016: Ken-Rad Radio Tube Type 12SC7 With Carton, by Ken-Rad, Kentucky, Mid 20th Century New window

42110: Morse Key Type 971, by Marconi Company, Britain, 20th Century. New window

42576: Medal Roerich Museum, by Henry Dropsy, New York, 1929 New window

42700: Radio-Special Micro Radio Valve Type E6, 20th Century New window

42997: Discharger, Early 20th Century New window

43387: Small Multiple Discharger, Early 20th Century New window

43561: Tapped Inductance, by Marconi Company, London, Early 20th Century New window

43603: Ebonite Partition Insulator, Early 20th Century New window

43735: Franklin Master Oscillator, by Marconi Company, England, c. 1930 New window

43964: Marconi-Osram Radio Valve Type DER, by Marconi Company, London, c. 1923 New window

44153: Tuning Condenser, Early 20th Century New window

44318: Variometer And Sliding Capacitor, by Marconi Company, London, Early 20th Century New window

44487: Radio Valve Type ARP12, England, c. 1939 New window

44566: Replica Morse Key, Late 20th Century New window

44893: Short Wave Tuner & Amplifier No. 17, by Robert W. Paul, London, c. 1915 New window

45250: 'Megger' Resistance Meter, by Evershead & Vignoles Ltd., London, Early 20th Century New window

45899: Instruction Manual For Communications Receiver Model 910/1, by Stratton & Company, Birmingham, New window

45902: Marconi Radio Valve Type Q, by Ediswan, London, c. 1918 New window

46042: 'Marconi' Crystal Wavemeter Type MC2, by Marconi Company, London, Early 20th Century New window

46043: Marconi Bronze Bust, by Claire Sheridan, England, 1920 New window

46067: Telephone Relay, Early 20th Century New window

46281: Company Seal Embosser Eastnor Electric Company Ltd, Britain, 20th Century New window

46329: 'Marconi' 1½KW Quenched Spark Gap Transmitter Type QG, by Marconi, London, c. 1920 New window

46376: Marconi Radio Valve Type MT1, by Marconi Company, London, Early 20th Century New window

46377: Marconi Radio Valve Type DEHL210, by Marconi Company, England, 20th Century New window

46382: Tilting Board, by Guglielmo Marconi, England, c. 1899 New window

46600: Short Wave Receiver Type CM294C, by Marconi Company, USA, 1917 New window

46605: Assorted Radio Valves, 20th Century New window

46879: Short Distance Wireless Telephone Set Type TT2, by Marconi Company, London, c. 1920 New window

46995: Marconi Kryha Cipher Machine, by Marconiphone Company, England, c. 1922 New window

47154: Marconi Aerial Tuning Inductance Coil, by Marconi Company, England, 1910 New window

47236: National Union Radio Tube Type 50L6GT With Carton, by National Union, New Jersey, c. 1941 New window

47261: Mobile Television Camera Type BD624C With Electronic Viewfinder Type BD625F, by Marconi Company, London, Mid 20th Century New window

47321: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

47410: Morse Key Type 100A, by Marconi Company, Britain, Early 20th Century. New window

47607: Lord Kelvin's Multicellular Voltmeter, by Kelvin Bottomley & Baird Ltd, Britain, 1920s New window

47690: Ebonite Partition Insulator, Early 20th Century New window

47978: 'Marconi' Amplifier Type GA2, by Marconi Company, London, Early 20th Century New window

48010: RCA Radiotron Radio Tube Type 6C6 With Carton, by RCA. USA, 20th Century New window

48312: Walnut Side Table, c. 1930 New window

48535: Tuning Condenser With Capacitor Box, by Marconi Company, England, c. 1916 New window

48561: Radio Valve Type P2, 20th Century New window

48642: Large Tuning Condenser, by Marconi Company, London, c. 1906 New window

48681: Marconi Radio Valve Type MT1, by Marconi Company, London, c. 1919 New window

48685: Radio Valve Type 5Z4G, Britain, Mid 20th Century New window

48716: Radio Valve Type 6V6G, by Mullard, England, Mid 20th Century New window

48922: Marconi-Osram Radio Valve Type DER, by Marconi Company, London, c. 1923 New window

49234: RCA Radiotron Cunningham Radio Tube Type 6B7 With Carton, by RCA, New Jersey, 20th Century New window

49244: Send/Receive Switch Type 103A, by Marconi Company, London, Early 20th Century New window

49422: 'Marconi' Wavemeter Type MP7, by Marconi Company, London, Early 20th Century New window

49429: Frame Aerial For Marconiphone Receiver Type 61, by Marconiphone Company, England, c. 1928 New window

49486: Marconi Radio Valve Type S625, by Marconi Company, England, c. 1928 New window

49571: Large Wave-Shortening Condenser With Case, by Marconi Company, London, Early 20th Century New window

49739: Large Marine Charging Switchboard, by Marconi Company, London, Early 20th Century New window

49744: Marconi Radio Valve Type V24, by Marconi Company, England, c. 1919 New window

49948: Marconi Wavemeter Type MC1, by Marconi Company, London, Early 20th Century New window

50000: Marconi-Type Radio Valve, by Marconi Company, England, 1920s/1930s New window

50144: Marconiphone Type V2A, by Marconi Company, England, c. 1923 New window

50421: Portrait of Marconi, by S. Tushingham, London, 20th Century New window

50523: Wireless Telegraphy Notice, Britain, Mid 20th Century New window

50538: Pillbox With Spare Coherer Parts, c.1902 New window

50711: Instruction Booklet For Aircraft Wireless Telephone Transmitter Type AD1, by Sanders, Phillips & Company, London, c. 1921 New window

50748: Siemens & Halske Experimental Radio Valve, by Siemens & Halske, Germany, c. 1917 New window

51047: Generator Propellor, Early 20th Century New window

51297: Small Buzzer Key With Base, Early 20th Century New window

51910: Assorted Early Coherer-Related Letters, Early 20th Century New window

52068: 'Marconi' Wavemeter Type No 2, by Marconi Company, London, c. 1906 New window

53026: Large Main Morse Key, by Marconi Company, London, Early 20th Century New window

53033: Triangular Base, Early 20th Century New window

53048: Two-Way Morse Key, by Siemens Brothers, London, 1900s New window

53061: Early Coherer, c. 1902 New window

53329: Interrupter Type 144, by Marconi Company, London, Early 20th Century New window

53371: Radio Valve Type VU120A, Mid 20th Century New window

53392: Quenched Spark Disc Unit, 20th Century New window

53586: Marconi's Parabolic Transmitter, by Guglielmo Marconi, England, c. 1896 New window

53614: Precision Measuring Instrument With Case, by Cambridge Scientific Company, Cambridge, Mid 20th Century New window

53696: Exhibition Medal Esposizione Internazionale, by Giannino, Milan, 1956 New window

54065: 'Marconi' Direction Finder Type 11F, by Marconi Company, London, c. 1920 New window

54296: Large Iolanda Switchboard, by Marconi Company, London, Early 20th Century New window

54481: Switch And Lamp Type 94, Early 20th Century New window

54651: 'Melba' Telephone Microphone No C100L, by Marconi Company, England, 1920 New window

54685: Terminal, Early 20th Century New window

54945: Magneto-Electric Machine, Late 19th Century New window

54960: Marconi Newton Constant-Speed Windmill 20Y Mark III, c. 1926 New window

55098: Myers Dry Battery Radio Tube With Carton, by Myers Company, Canada, c. 1924 New window

55254: Walnut Armchair, c. 1930 New window

55299: Cylindrical Reflecting Vertical Galvanometer, by H. Tinsley & Company, London, c. 1925 New window

55328: Company Seal Embosser Oriental Tube Company, Britain, 20th Century New window

55585: Early Coherer No 217, c. 1899 New window

55702: Civilian Gentleman's Ceremonial Sword, by J. B. Johnstone, London, c. 1902 New window

56269: Ohmmeter, by Cambridge & Paul Instrument Company, England, Early 1920s New window

56270: Republic Radio Tube Type 6F5G With Carton, by Republic Corporation, New Jersey, 20th Century New window

56300: Wireless Telegraphy Notice, Britain, Mid 20th Century New window

56341: Forward Spark 'B' Wavemeter No. 2006, by War Department, Britain, c. 1918 New window

56351: Proof Print of Marconi, by G. B. Black, London, c. 1914 New window

56506: Gray Magnetic Relay Key, by Marconi Company, London, c. 1910 New window

56547: 'Marconi' Wavemeter, by Marconi Company, London, 20th Century New window

56677: RCA Radiotron Radio Tube Type 6J7 With Carton, by RCA, USA, 1943 New window

56681: RCA Radiotron Cunningham Radio Tube Type 5Z3, by RCA, USA, 20th Century New window

56721: Marconi Commemorative Plaque, by D. Sodini, Florence, 1911 New window

56738: Sykes Microphone, by Sykes, England, 1923 New window

57185: Ship's Bridge Telephone, Early 20th Century New window

57337: RCA Radiotron Radio Tube Type 6D6 With Carton, by RCA, New Jersey, 20th Century New window

57431: Osram Radio Valve Type P2, by Osram Company, England, 20th Century New window

57633: Early Coherer, France, c. 1899 New window

57720: Large Iolanda Transformer With Case, Early 20th Century New window

57736: Potentiometer For Marconi Five-Valve Receiver, by Marconi Company, London, 1922 New window

58056: Marconiphone Universal Baby Crystal Receiver, by Marconiphone Company, England, c. 1924 New window

58568: Ship's Bridge Telephone, Early 20th Century New window

58602: Marconiphone Two-Valve Receiver Type V2A, by Marconiphone Company, England, c. 1924 New window

58903: Large Main Condenser With Case, by Marconi Company, London, Early 20th Century New window

58967: RCA Radiotron Radio Tube Type 6B7 With Carton, by RCA, USA, 20th Century New window

59017: Osram-GEC Radio Valve Type R4, by Osram-GEC, England, c. 1916 New window

59257: Marconi-Osram Radio Valve Type R, by Marconi Company, London, c. 1923 New window

59269: Precision Instrument Model EGM2, by Cambridge Instrument Company, London & Cambridge, Mid 20th Century New window

59451: 'Marconi Otophone', by Marconi Company, London, 1923 New window

59526: Multiple Oscillator, by Marconi Company, London, Early 20th Century New window

59677: 'Marconi' Lifeboat Transmitter Type 241A, by Marconi Company, London, c. 1920 New window

59723: STC Radio Tube Type 6J5G, by STC, England, Mid 20th Century New window

59770: B T-H Plaque, Britain, 20th Century New window

59943: Replica Of Parabolic Transmitter For Marconi's Original Beam System, by Marconi Company, England, 1920s/1930s New window

59984: Marconi Telegraph Communication Chart, by Marconi Company, London, c. 1922 New window

60590: Marconi Radio Valve Type V24, by Marconi Company, England, c. 1918 New window

60662: RCA Radiotron Radio Tube Type 6D6 With Carton, by RCA, New Jersey, 20th Century New window

61008: Portable Valve Transmitter, by Marconi Company, London, 1919 New window

61022: Small Coupled Two-Way Switch, Early 20th Century New window

61290: Single-Turn Primary Coil, Early 20th Century New window

61523: Magneto-Electric Machine, Late 19th Century New window

61674: RCA Radiotron Cunningham Radio Tube Type 6D6 With Carton, by RCA, New Jersey, 20th Century New window

61771: Trembler Coil, by Marconi Company, England, c. 1907 New window

61791: RCA Radiotron Acorn Radio Tube Type VT121 With Carton, by RCA, New Jersey, Mid 20th Century New window

62304: Marconi Five-Valve Receiver, by Marconi Company, London, 1922 New window

62344: RCA Radiotron Cunningham Radio Tube Type 6L7 With Carton, by RCA, New Jersey New window

62393: Marconi Radio Valve Type DE3C, by Marconi Company, London, c. 1924 New window

62415: Company Seal Embosser Elliot Flight Automation Ltd, Britain, 20th Century New window

62660: 'Marconi' Ammeter, by Marconi Company, England, 20th Century New window

62812: Lead-Acid Accumulator, Early 20th Century New window

62884: Marconi Radio Valve Type DEV, by Marconi Company, England, c. 1923 New window

62930: Early Coherer, c. 1902 New window

63794: Marconi Crystal Receiver Type 16, by Marconi Company, London, 1916 New window

64011: Brimar Radio Valve Type 6V6GT, by Brimar, England, 1940s New window

64043: 120 Ohm Resistance Coil, Early 20th Century New window

64147: Bell Telephone Microphone, England, c. 1923 New window

64286: Radio Valve Type ARP12, England, c. 1939 New window

64400: Company Seal Embosser Firth Cleveland Instruments Ltd, Britain, 20th Century New window

64464: Tuned Circuit Transmitter, by Marconi Company, London, c. 1900 New window

64468: RCA Radiotron Radio Tube Type 6C6 With Carton, by RCA, New Jersey, 20th Century New window

64661: Porcelain Insulators, 20th Century New window

64933: Marconi-Osram Radio Valve Type DET 1A, by Marconi Company, London, 20th Century New window

64947: Rogers Radio Tube Type VR56, by Rogers, Canada, Mid 20th Century New window

64976: Trembler Coil, by Marconi Company, England, c. 1907 New window

64999: Rotary Spark Discharger, c. 1906 New window

65352: Stud Field Regulating Rheostat, by Electric Construction Company, England, Early 20th Century New window

65804: Alexandra Palace Mast, by Marconi Company, 1936 New window

65806: Large Fixed-Gap Discharger With Case, by Marconi Company, London, Early 20th Century New window

65827: Portrait of Marconi, by Gustave Muranyi, 1914 New window

65922: 'Marconi' Direction Finder Type DFM2, by Marconi Company, London, c. 1927 New window

65935: Voltmeter With Case, Britain, Early 20th Century New window

66117: Tuning Condenser, by Marconi Company, England, c. 1916 New window

67148: 4 Volt Fleming Valve, by Royal Ediswan, London, c. 1905 New window

67162: Fleming Valve, by Ediswan, London, c. 1905 New window

67172: Company Seal Embosser Robtron Controls Ltd, by Jordan & Sons, London, 20th Century New window

67628: RCA Radiotron Cunningham Radio Tube Type 5Z4 With Carton, by RCA, New Jersey, Mid 20th Century New window

67687: Marconi Crystal Receiver Type 31C, by Marconi Company, London, 1910 New window

67799: Righi Oscillator, by Augusto Righi, Bologna, 1896 New window

67916: Coherer Receiver, by Marconi Company, London, 1902 New window

68373: Marconi Radio Valve Type FE2, by Marconi Company, London, c. 1922 New window

68465: Receiver Type R1155A, by Air Ministry, c. 1940 New window

68721: Low Frequency Iron Core Inductance In Wooden Box, by Marconi Company, London, Early 20th Century New window

69068: Siemens & Halske Radio Valve Type RE87, by Siemens & Halske, Germany, 20th Century New window

69070: BBC-Marconi Ribbon Microphone, by Marconi Company, London, Mid 20th Century New window

69132: Mullard Radio Valve Type EF37A, by Mullard, England, Mid 20th Century New window

69155: Marconi Aerial Tuning Inductance Coil, by Marconi Company, England, 1910 New window

69398: RCA Radiotron Cunningham Radio Tube Type 6L7 With Carton, by RCA, New Jersey, New window

69632: Telephone Arc Transmitter, by Marconi Company, London, 1910 New window

69685: 'Marconi' Tuning Fork Type BS10, by Marconi Company, London, 20th Century New window

69707: Precision Instrument, by Marconi Company, London, Early 20th Century New window

69748: Newton Induction Coil, by Newton & Company, London, c. 1899 New window

69851: Company Seal Embosser J.W. Flower & Company Ltd, Britain, 20th Century New window

69868: Crystal Valve Receiver, by Marconi Company, London, c. 1910 New window

69910: Radio Valve Type ARP12, England, c. 1939 New window

69944: Small Tuning Condenser, by Marconi Company, England, c. 1916 New window

70075: Giant Radio Valve, by GEC, England, 1910s New window

70143: Marconi Radio Valve Type DE6, by Marconi Company, England, c. 1925 New window

70145: Marconi Radio Valve Type Q, by Ediswan, London, c.1919 New window

70198: 'Long Tom' Aerial Tuning Inductance Coil, by Marconi Company, c. 1900 New window

70200: Weston Standard Cell Type D402B, by Muirhead Company, Britain, 20th Century New window

70226: Marconi Plastic Bust, 20th Century New window

70312: Radio Valve Type ATP4, England, Mid 20th Century New window

70529: RCA Radiotron Cunningham Radio Tube 5Z4 With Carton, by RCA, New Jersey, Mid 20th Century New window

70536: Two High Frequency Chokes In Mounted Cases, Early 20th Century New window

70589: Morse Key, by Elliott Brothers Ltd, London, Early 20th Century New window

70590: Replica Righi Oscillator, Late 20th Century New window

70649: Replica Grasshopper Send-Receive Morse Key, Late 20th Century New window

70668: RCA Radiotron Cunningham Radio Tube Type 6B7 With Carton, by RCA, New Jersey, 20th Century New window

70800: Spare Wires, 20th Century New window

70906: Marconi Radio Valve Type V24, by Marconi Company, England, Early 20th Century New window

71080: Telephone Transformer Type 191A, by Marconi Company, England, Early 20th Century New window

71104: Marconi Watercolour, by Leslie Ward, England, c. 1906 New window

71246: Morse Tape Inker, by Marconi Company, England, c. 1900 New window

71249: Rotary Spark Discharger, by Marconi Company, London, Early 20th Century New window

71310: Radio Valve Type AR8, England, Mid 20th Century New window

71452: Small Morse Key, Early 20th Century New window

71494: Marconi Five-Valve Receiver, by Marconi Company, London, 1922 New window

71527: RCA Radiotron Radio Tube Type 6D6, by RCA, USA, 20th Century New window

71648: Radio Valve Type VR112, England, Mid 20th Century New window

71856: Replica Memorial Plaque Of South WellFleet Station (USA), USA, Late 20th Century New window

71971: Large Company Seal Embosser Chamberlain & Hookham Ltd, Britain, 20th Century New window

71985: Empty Case Of Forward Spark 'B' Wavemeter No. 2001, by War Department, Britain, c. 1918 New window

72143: Early Coherer, Dover, c. 1899 New window

72238: Call Sign, 20th Century New window

72278: Bone Coherer Support Rod, c. 1902 New window

72382: RCA Radiotron Radio Tube Type 6C8G With Carton, by RCA, USA, 20th Century New window

72410: Capacitor, by W.G. Pye & Company, Cambridge, Early 20th Century New window

72568: Assorted Spare Parts For Radio Receiver Type BC342N, by Chicago Transformer Corporation, USA, 1940s New window

72720: High Frequency Sliding Inductance, by Marconi Company, London, New window

72723: RCA Radiotron Cunningham Radio Tube Type 6L7 With Carton, by RCA, New Jersey, Mid 20th Century New window

72754: Marconi Operator's Watch, Switzerland, c. 1910 New window

72842: Ship's Bridge Telephone, Early 20th Century New window

72885: Shunt Regulator Type O, 20th Century New window

72905: Exhibition Medal Exposition of Electricity And Serious Industry, Italy, 1899 New window

73031: Radio Valve Type ARP12, England, c. 1939 New window

73073: Fama Radio Valve Type R, by Fama, Holland, c. 1916 New window

73080: Frame Aerial For Marconiphone Receiver Type 61, by Marconiphone Company, England, c. 1928 New window

73461: Company Seal Embosser W.W. Buckley & Son Ltd, by H. Howes Company, London, 20th Century New window

73816: Earth Arrester Plate, Early 20th Century New window

74162: Marconi Radio Valve Type Q, by Ediswan, London, c. 1918 New window

74328: Signal Hall Kite, by G.C. Spencer & Sons, London, c. 1901 New window

74444: Marconi's Sword-Stick, c. 1900 New window

74506: Cover For Multiple Tuner, by Marconi Company, England, c. 1907 New window

74683: Cylindrical Reflecting Vertical Galvanometer, by Cambridge & Paul Instrument Company, England, Early 1920s New window

74920: Marconi Radio Valve Type DEQ, by Marconi Company, England, c. 1923 New window

74966: Marconi Radio Valve Type LF2, by Marconi Company, Britain, 20th Century New window

75181: Marconiphone Receiver Type P17B, by Marconi Company, England, c. 1950 New window

75237: Tuning Condenser, by Marconi Company, England, c. 1916 New window

75263: Marconi Radio Valve Type DEV, by Marconi Company, England, c. 1923 New window

75339: 'Marconi' Direction Finder Type 11F, by Marconi Company, London, c. 1920 New window

75359: Company Seal Embosser Switchgear & Cowans Ltd, by Art? Right & Rattray, Manchester, 20th Century New window

75653: Company Seal Embosser Walsall Conduits Group Ltd, by Jordan & Sons, London, 20th Century New window

75823: Company Seal Embosser GEC-Elliot Computer Software Ltd, Britain, 20th Century New window

75930: Three-Turn Primary Coil, Early 20th Century New window

75969: Magnetic Detector, by Marconi Company, London, Early 20th Century New window

76048: Experimental Two-Valve Set, c. 1916 New window

76426: Marconi Radio Valve Type V24, by Marconi Company, England, Early 20th Century New window

76469: Company Seal Embosser Elliot Ltd, Britain, 20th Century New window

76594: Marconi Note Magifier Type 227B, by Marconi Company, England, c. 1920 New window

76654: Radio Valve Type ARTP2, England, Mid 20th Century New window

76739: Large Aerial Tuning Inductance With Case, by Marconi Company, London, Early 20th Century New window

76742: Two Ebonite Tube Insulators, Early 20th Century New window

76996: Hivac Radio Valve Type CV1052, by Hivac, England, Mid 20th Century New window

76997: RCA Radiotron Cunningham Radio Tube Type 6L7 With Carton, by RCA, New Jersey, Mid 20th Century New window

77017: Marconi Radio Valve Type U33, by Marconi Company, England, 20th Century New window

77413: Siemens & Halske Radio Valve Type RE87, by Siemens & Halske, Germany, 20th Century New window

77499: 12 Volt Fleming Valve, by Royal Ediswan, London, c. 1905 New window

78080: Civilian Gentleman's Ceremonial Cocked Hat, by J. B. Johnstone, London, c. 1902 New window

78432: RCA Radiotron Cunningham Radio Tube Type 6B7 With Carton, by RCA, New Jersey, 20th Century New window

78507: Townsend Wavemeter, by Marconi Company, London, c. 1918 New window

78582: Candlestick Microphone, by Sterling Company, London, c. 1927 New window

78623: Leclanche Cell, by General Electric Company, USA, Early 20th Century New window

78655: Radio Receiver Type BC342N, 1940s New window

78859: Marconi Bellini-Tosi Direction Finder, by Marconi Company, London, c. 1916 New window

79026: Replica Righi Oscillator, Late 20th Century New window

79145: Transmitter Type AD87B, by Marconi Company, England, c. 1940 New window

79157: Three Port Circulator, by Marconi Company, England, 20th Century New window

79280: Grasshopper Send-Receive Morse Key, by Marconi Company, England, c. 1899 New window

79293: Osram Radio Valve Type CM8, by Osram Company, England, 20th Century New window

79425: Assorted Copper Busbars And Ebonite Insulators, Early 20th Century New window

79427: Shunt Regulator Type OA, 20th Century New window

79516: Mazda Radio Valve Type PY33 With Carton, by Mazda, England, 1960s New window

79721: Marconi Sykes Microphone, by Marconi Company, London, c. 1923 New window

79785: Marconi Radio Valve Type U10, by Marconi Company, London, 20th Century New window

80012: Gecophone Crystal Set, by GEC, c. 1921 New window

80037: Marconi Radio Valve Type D42, by Marconiphone Company, England, 20th Century New window

80165: RCA Radiotron Radio Tube Type VR54, by RCA, USA, 20th Century New window

80189: Marconi-Osram Radio Valve Type DER, by Marconi Company, London, 1920s New window

80256: Receiver Type R1155A, by Air Ministry, c. 1942 New window

80281: Aircraft Wireless Receiver, by Marconi Company, London, c. 1921 New window

80385: Zaerix Electronic Valve Type KTW61, by Z & I Aero Services With Carton, London, Mid 20th Century New window

80500: Hytron Radio Tube Type E1148 With Carton, by Hytron Corp., Massachusetts, 1944 New window

80572: Fleming Valve, by J.A. Fleming, England, c. 1889 New window

80623: National Union Radio Tube Type 35Z5GT With Carton, by National Union, USA, c. 1942 New window

80773: Osram Radio Valve Type R, by Osram, England, c. 1918 New window

80963: Cluster Of Six Small Glass Tubes, c. 1902 New window

81193: 18-Inch Induction Coil, by Marconi Company, London, 1898 New window

81227: Ken-Rad Radio Tube Type 6SN7GT, by Ken-Rad, USA, Mid 20th Century New window

81229: Aircraft Wireless Telephone Transmitter Type AD1, by Marconi Company, England, 1921 New window

81277: Marconi Receiver CR100, by Marconi Company, England, Mid 20th Century New window

81565: Marconi Radio Valve Type Q, by Ediswan, London, c. 1918 New window

82016: Walnut Kneehole Desk, c. 1935 New window

82041: Marconi-Osram Radio Valve Type R, by Marconi Company, London, c. 1925 New window

82120: RCA Radiotron Radio Tube Type 6D6, by RCA, USA, 20th Century New window

82126: Rogers Radio Tube Type VR56, by Rogers, Canada, Mid 20th Century New window

82360: 'Marconi' Auto-Alarm Morse Key Type 316A, by Marconi Company, England, c. 1920 New window

82611: Brass-Tipped Bone Stylus, c. 1902 New window

83077: Marconi Radio Valve Type V24, by Marconi Company, England, 1920s New window

83305: Mullard Radio Valve Type 2D4A, by Mullard, Britain. Mid 1930s New window

83471: Dario Radio Valve Micro Special, by Dario, France, Mid 20th Century New window

83921: Marconi Radio Valve Type DEV, by Marconi Company, England, c. 1923 New window

83986: Morse Key Type 365, by Marconi Company, London, 20th Century. New window

84014: Multiple Oscillator, by Marconi Company, England, Early 20th Century New window

84133: Triple Crystal Detector, Early 20th Century New window

84752: Marconi-Osram Radio Valve Type MPT4, by Marconi Company, London, Late 1920s New window

84767: Company Seal Embosser GEC-Elliot Automation Ltd, Britain, 20th Century New window

84869: Philips Radio Valve Type R, by PhilIps, Holland, 1920s New window

84925: RCA Radiotron Radio Tube Type 6D6 With Carton, by RCA, New Jersey, 20th Century New window

85146: Large Cylindrical Leyden Jar, 1900 New window

85569: Marconi-Osram Radio Valve Type R, by Marconi Company, London, c. 1923 New window

85593: Experimental Fleming Valve, by J.A. Fleming, England, c. 1889 New window

85745: Short Wave Receiver Type 372, by Marconi Company, London, Mid 20th Century New window

86206: Instruction Booklets For Marconi Wavemeters, by Sanders Phillips & Company, London, c. 1919 New window

86390: Marconi's Coherer Receiver, by Guglielmo Marconi, England, 1896 New window

86405: 4 Volt Experimental Fleming Oscillation Valve, by Ediswan, London, 1904 New window

86416: BBC Radio Crystals With Tin, by BBC Crystal Ltd., Britain, Early 20th Century New window

86462: Mazda Radio Tube Type AR8, by Mazda, England, c. 1938 New window

86475: Tungsram Radio Valve Type P43t-38 With Carton, by Tungsram, France, 20th Century New window

86740: Silvertown Condensor, by Silvertown, USA, 1918 New window

86892: Morse Key, by Marconi Company, England, c. 1900 New window

87142: Tuned Field Transmitter, by Marconi Company, England, 1907 New window

87176: Marconi Radio Valve, by Marconiphone Company, England, 1920s/1930s New window

87203: Ink-Writer, by General Post Office, England, c. 1900 New window

87224: Triple X-Stopper, by Marconi Company, London, Early 20th Century New window

87284: 'Marconi' Tuning Fork, by Marconi Company, London, 20th Century New window

87538: Bone Coherer Support Rod, by Marconi Company, England, c. 1900 New window

87609: Coil-Type Testing Buzzer With Case, Early 20th Century New window

87758: Coil For Receiver Type R1155A, by Air Ministry, c. 1940 New window

88183: Marconi Radio Valve Type LP2, by Marconi Company, England, 1930s New window

88195: Company Seal Embosser Marconi Television Company Ltd, Britain, 20th Century New window

88505: Empty Case Of Forward Spark 'B' Wavemeter No. 1360, by War Department, Britain, c. 1918 New window

88541: Instruction Booklet for Marconi Kryha Cipher Machine, by Marconi Company, London, c. 1920 New window

88561: Marconi Emblem Plaque, by Marconi Company, England, 20th Century New window

88737: Marconi Induction Coil, by Marconi Company, London, Early 20th Century New window

88794: Marconi Radio Valve Type DE6, by Marconi Company, London, c. 1925 New window

88920: Early Coherer, c. 1899 New window

89266: RCA Radiotron Radio Tube 42 With Carton, by RCA, USA, 20th Century New window

89342: 12 Volt Fleming Valve, by Ediswan, London, c. 1905 New window

89483: Small Morse Key, Early 20th Century New window

89558: Reproduction Photograph Of Dame Melba, England, 20th Century New window

89862: Telephone Jigger Box, by Marconi Company, London, c. 1916 New window

89981: 12 Volt Fleming Valve, by Ediswan, London, c. 1905 New window

90029: Marconiphone Two-Valve Receiver Type V2A, by Marconiphone Company, England, c. 1924 New window

90152: Aircraft Direction Finder Receiver Type AD16, by Marconi Company, London, c. 1928 New window

90595: Carborundum Detector, Early 20th Century New window

90635: Marconi Radio Valve Type V24, by Marconi Company, England, 1920s New window

90897: Stud Motor Starter, by Electric Construction Company, England, Early 20th Century New window

90974: Audion Radio Valve, by De Forest, USA, c. 1907 New window

91156: Walnut Wardrobe, c. 1930 New window

91438: Case For Coherer Receiver, by Marconi Company, London, c. 1902 New window

91470: Company Seal Embosser Betram Thomas Ltd, by Jordan & Sons, London, 20th Century New window

91546: Radio Valve Type CV1342, Britain, 1950s New window

91607: Righi Oscillator, by Marconi Company, London, 20th Century New window

91673: Radio Valve Type ARP12, England, c. 1939 New window

91686: RCA Radiotron Radio Tube Type 80 With Carton, by RCA, New Jersey, 20th Century New window

91708: Double-Pole Single-Throw Switch, England, Early 20th Century New window

91761: Gulstad Relay, by Elliot Brothers Ltd, London, Early 20th Century New window

91762: Toothed Disc For Rotary Spark Discharger, c. 1906 New window

92020: Balloon Envelope Radio Valve, 20th Century New window

92047: Marconi Radio Valve Type V24, by Marconi Company, England, Early 20th Century New window

92061: Marconi Bronze Bust, by Claire Sheridan, England, 1920 New window

92097: Call Sign, 20th Century New window

92107: Main Starter Switch, Early 20th Century New window

92109: Townsend Wavemeter, by Marconi Company, London, 1918 New window

92559: American-Type Radio Tube, USA, 20th Century New window

92745: Walnut Safe Cabinet, c. 1930 New window

92775: Marconi Radio Valve Type FE2, by Marconi Company, London, c. 1922 New window

92814: American-Type Radio Tube, USA, 20th Century New window

93260: Marconi Crystal Receiver A Type RB3, by Marconi Company, England, 1922 New window

93608: Exhibition Medal Franco-British Exhibition, by F. Bowcher, Birmingham, 1908 New window

93609: American-Type Radio Tube, USA, 20th Century New window

93660: 4 Volt Fleming Valve, by Royal Ediswan, London, c. 1905 New window

93797: RCA Radiotron Cunningham Radio Tube Type 5Z4 With Carton, by RCA, New Jersey, Mid 20th Century New window

93858: Mullard Radio Valve Type PY33, by Mullard, Britain, 1960s New window

93933: Small Ohmmeter, by Cambridge & Paul Instrument Company, England, Early 1920s New window

94035: Experimental Two-Valve Set, c. 1916 New window

94060: 1901 Transatlantic Billi Condenser, c. 1901 New window

94143: British-Style Radio Valve, Britain, 20th Century New window

94316: Newton Induction Coil, by Newton & Company, London, c. 1899 New window

94461: 'Marconi' Universal Aircraft Telegraph Transmitter/Receiver Type AD6D, by Marconi Company, London, c. 1928 New window

94475: Marconi Radio Valve Type R, by Marconi Company, England, c. 1916 New window

94536: Marconi Radio Valve Type DEV, by Marconi Company, England, c. 1923 New window

94575: Portrait of Marconi, by A. Chevalier Taylor, London, 1912 New window

94821: Replica Morse Key, Late 20th Century New window

95036: Onwood's Patent Ohmmeter, by Gambrell Brothers, London, Early 20th Century New window

95560: Morse Key Type 971, by Marconi Company, Britain, 20th Century. New window

95767: GEC Bakelite Radio Receiver, by GEC, England, Mid 20th Century New window

95808: Generator Propellor, Early 20th Century New window

95936: 'Marconi' Mercury Phone Card, by TRT/FTC Communications Incorporated, Britain, Late 20th Century New window

96026: Carton For Marconi Valve Type GTIC, by Marconi Company, England, Mid 20th Century` New window

96057: Tuning Condenser, by Marconi Company, England, c. 1916 New window

96207: Lapel Pin National Institute Of Inventors, 20th Century New window

96292: Siemens Radio Valve Type LD2, by Siemens, Germany, c. 1945 New window

96386: 1901 Transatlantic Self-Restoring Coherer, by Lieutenant Luigi Solari, Italy, c. 1901 New window

96442: Ohmmeter, by Cambridge & Paul Instrument Company, England, Early 1920s New window

96466: Variometer, by Marconi Company, London, c. 1920 New window

96591: Marconi Reproduction Photograph, by J. Beuyann, 20th Century New window

96640: Osram-GEC Radio Valve Type R4, by Osram-GEC, England, 1917 New window

96661: 1901 Transatlantic Receiver, by Collier-Marr Company, Manchester, 1901 New window

96891: Facsimile Of Daily Sketch, by E. Hulton & Company, England, 1912 New window

96920: Mullard Radio Valve Type ECC35, by Mullard, Britain, 20th Century New window

96935: Morse Twin-Contact Key, Britain, 20th Century New window

96983: 75th Anniversary Commemorative Cup, by Ceragraphics, Devon, 1978 New window

97073: Precision Instrument, by Marconi Company, England, Early 20th Century New window

97148: Remote-Control Switch, Early 20th Century New window

97219: Marconiphone Six-Valve Receiver Type 61, by Marconiphone Company, London, c. 1928 New window

97232: Tungsram Radio Valve Type RV200/600, by Tungsram, England, Mid 20th Century New window

97470: Coil Condensor, by Marconi Company, England, Early 20th Century New window

97710: All-Wave Super 6 Radiogram, by GEC, England, 1937 New window

98095: Tuning Condenser, by Marconi Company, England, c. 1915 New window

98216: Marconi Crystal Receiver Type 31, by Marconi Company, London, c. 1910 New window

98230: Communications Receiver Model 910/1 With Speaker, by Marconi Company, England, Mid 20th Century New window

98396: Tuned Transmitter, by Guglielmo Marconi, England, 1899 New window

98482: Marconi-Reisz Microphone, by Marconi Company, London, c. 1923 New window

98535: Studio Photograph of H. Cuthbert Hall?, by Elliott & Fry, London, Early 20th Century New window

98599: Kilo-Volt Test Instrument, by Jack Worrell, England, 1920s/1930s New window

98826: Company Seal Embosser EA Automation Sevices Ltd, 20th Century New window

98851: 'Marconi' Wavemeter Instruction Leaflet, by Marconi Company, London, c. 1906 New window

98899: Early Small Coherer, by Guglielmo Marconi, Italy, c. 1895 New window

98935: RCA Radiotron Cunningham Radio Tube Type 6B7 With Carton, by RCA, New Jersey, 20th Century New window

98971: Case For Coherer Receiver, by Marconi Company, England, 1905 New window

99012: Marconi Crystal Receiver With Valve, by Marconi Company, London, c. 1916 New window

99245: Coherer Receiver, by Marconi Company, London, 1905 New window

99266: Magnetic Detector, by Marconi Company, London, 1907 New window

99331: Magnetic Key Relay, by Marconi Company, London, Early 20th Century New window

99434: Variable Resistance Switch For Aircraft Wireless Telephone Type AD2, by Marconi Company, England, c. 1920 New window

99532: Marconiphone Crystal Junior Receiver Type RB2, by Marconi Company, Chelmsford, 1922 New window

99552: De Forest Audiotron Radio Valve, by De Forest, Early 20th Century New window

99640: Marconi Radio Valve Type QX, by Marconi Company, London, c. 1921 New window

99765: Morse Tape Inker, by Marconi Company, London, c. 1900 New window