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

Inventory Number: 39568

39568-1t 39568-2t

Date: Early 20th Century

Maker Details: Attributed to Ediswan.

Inscription: "MARCONI'S W.T. CO LTD / 8" printed on exterior surface of bulb.

Size: 165 mm in overall length (including base pins)

Materials: Glass, steel, bakelite?, assorted metals.

Other Given Number(s): Christie's 213.


Marconi Radio Thermal Delay Switch of DLS-Type with very large glass balloon, steel-plated bakelite? base and five steel base pins. Base slightly damaged on surface. Anode mounted vertically inside interior of bulb. Previously catalogued with assorted other valves.

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