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12 Volt Fleming Valve, by Royal Ediswan, London, c. 1905
Inventory Number: 77499
Date: c. 1905
Maker Details: Signed by Royal Ediswan.
Inscription: "ROYAL EDISWAN" stamped on one side of exterior surface of bulb. "FLEMING OSCILLATION VALVE / 12 VOLTS." stamped other side of exterior surface of bulb.
Size: 95 mm in overall length
Materials: Glass, brass?, assorted metals.
Other Given Number(s): Christie's 195.
Notes:
12 Volt Fleming Valve with bayonet fitting, anode connecting wire and brass? base.
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