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4 Volt Fleming Valve, by Royal Ediswan, London, c. 1905

Inventory Number: 93660

Date: c. 1905

Maker Details: Signed by Royal Ediswan.

Inscription: "ROYAL EDISWAN / 'FLEMING OSCILLATION VALVE' / 4. VOLTS" stamped on exterior surface of bulb.

Size: 70 mm in overall length

Materials: Brass, glass, assorted metals.

Other Given Number(s): Christie's 194.


4 Volt Fleming Oscillation Valve, with bayonet fitting, anode connecting wire and brass base. Previously catalogued with other Fleming Valve (Inv. Num. 41677).

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