Search for all terms: Material: ebonite Page 1 of 236 records found. Displaying 25 50 100 200 at a time.Next Results > Records with Images1. Tuning Condenser, by Marconi Company, English, c. 1907 2. Marconiphone Two-Valve Receiver Type 21, by Marconiphone Company,... 3. Morse Twin-Contact Key, Britain, 20th Century 4. Morse Key Type 971, by Marconi Company, Britain, 20th Century. 5. Morse Key Type 100A, by Marconi Company, Britain, Early 20th... 6. Morse Key Type 100A, by Marconi Company, Britain, Early 20th... 7. Triple Crystal Detector, Early 20th Century 8. Morse Key Type 971, by Marconi Company, Britain, 20th Century. 9. Double-Pole Single-Throw Switch, English, Early 20th Century 10. 'Marconi' Auto-Alarm Morse Key Type 316A, by Marconi Company,... 11. Amplifier Type 91, by Marconi Company, London, c. 1918 12. 'Marconi' Wavemeter, by Marconi Company, London, 20th Century 13. Telephone Transformer Type 191A, by Marconi Company, English,... 14. 'Marconi' Auto-Alarm Buzzer Type 225, by Marconi Company, English,... 15. 'Marconi' Direction Finder Type DFM2, by Marconi Company, London,... 16. 'Marconi' Direction Finder Type DFM2, by Marconi Company, London,... 17. Marconi's Oil Righi Oscillator, by Augusto Righi, Bologna,... 18. Telegraph Repeater or Morse Sounder, by Elliott Brothers (London)... 19. Morse Key and Attachment, by Siemens Bros. & Co. Ltd., London,... 20. Marconi Crystal Receiver Type 31C, by Marconi Company, London,... 21. 12 Volt Fleming Valve, by Ediswan, London, c. 1905 22. 4 Volt Fleming Valve, by Royal Ediswan, London, c. 1905 23. 12 Volt Fleming Valve, by Ediswan, London, c. 1905 24. Experimental Fleming Valve, by J.A. Fleming, English, c. 1889 25. Comparator, by Lovibond, Salisbury, 1950s Next Results >