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Displaying 121 to 140 of 655 records
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| Heading | Date | Maker | Place | Materials | Inv Num | |
|---|---|---|---|---|---|---|
| View Record | Rotary Spark Discharger | Early 20th Century | Marconi's Wirelss Telegraph Co. Ltd. | London | Steel, brass, cast iron. | 71249 |
| View Record | De Forest Audiotron Radio Valve | Early 20th Century | De Forest. | Unknown | Copper?, glass, assorted metals. | 99552 |
| View Record | Exhibition Medal Franco-British Exhibition | Dated 1908 | F. Bowcher. | Birmingham | Gilt silver. | 93608 |
| View Record | Audion Radio Valve | c. 1907 | Lee De Forest. | USA | Glass, assorted metals. | 90974 |
| View Record | Telephone Relay | Early 20th Century | Unknown | Britain | Mahogany, brass, nickel. | 46067 |
| View Record | Telephone Relay Type G | c. 1908 | S.G. Brown. | London | Mahogany, steel?, brass. | 13183 |
| View Record | Direct Reading Portable Decremeter | Dated 1909 | Marconi's Wireless Telegraph Co. Ltd. | London | Teak, brass, leather, ebonite, bakelite. | 28627 |
| View Record | Direct Reading Portable Decremeter | Dated 1909 | Marconi's Wireless Telegraph Co. Ltd. | England | Teak, brass, ebonite, bakelite, leather. | 19011 |
| View Record | Precision Measuring Instrument With Case | Early 20th Century | Cambridge Scientific Co. Ltd. | Cambridge, England | Ebonite, brass, baize, mahogany. | 41846 |
| View Record | 'Cow's Tail' Insulator | Early 20th Century | Unknown | Unknown | Brass, wood, cable. | 15574 |
| View Record | Leclanche Cell | Early 20th Century | General Electric Co. Ltd. | USA | Glass, earthenware?, steel. | 78623 |
| View Record | Morse Key Type 100A | Early 20th Century | Marconi International Marine Communication Co. Ltd. | Britain | Nickel, mahogany, ebonite, steel. | 47410 |
| View Record | Morse Key Type 100A | Early 20th Century | Marconi International Marine Communication Co. Ltd. | Britain | Nickel, mahogany, ebonite, steel. | 24429 |
| View Record | Switch And Lamp Type 94 | Early 20th Century | Unknown | Unknown | Teak?, brass, glass, porcelain?, metal. | 54481 |
| View Record | Coil Condensor | Early 20th Century | Marconi's Wireless Telegraph Co. Ltd. | England | Brass?, wood. | 97470 |
| View Record | Gray Magnetic Relay Key | c. 1910 | Marconi's Wireless Telegraph Co. Ltd. | London | Teak, iron?, ebonite? wood, metal alloy, silver. | 56506 |
| View Record | Double-Pole Single-Throw Switch | Early 20th Century | Unknown | England | Ebonite, wood, teak?, steel, brass, copper alloy. | 91708 |
| View Record | 'Marconi' Wavemeter Type MP7 | Early 20th Century | Marconi 's Wireless Telegraph Co. Ltd. | London | Carborundum, paper, wood, plastic, ebonite, steel | 49422 |
| View Record | Three-Turn Primary Coil | Early 20th Century | Unknown | Unknown | Wood, brass. | 75930 |
| View Record | Marconi Crystal Receiver Type 31C | 1910 | Marconi's Wireless Telegraph Co. Ltd. | London | Ebonite, nickel, mahogany?, bakelite. | 21573 |