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Marconi Radio Valve Type D42, by Marconiphone Company, English, 20th Century

preview image for Marconi Radio Valve Type D42, by Marconiphone Company, English, 20th Century
Inventory Number: 80037
Object Type:
Place Created: England United Kingdom Europe
Accession Number: 2004-9/348
Brief Description: Marconi Radio Valve Type D42, in glass balloon envelope. With partially silvered surface, probably due to manufacturing process. Upon polished black bakelite? base with four steel base pins. Marconiphone Co. Ltd. was founded in December 1923 so valve can be dated post-1923.
Primary Inscriptions: "THE MARCONIPHONE CO. LTD. / MARCONI / B.V.A." printed on transfer stuck to exterior surface of bulb. "D42 / MADE & PATENTED / IN ENGLAND" printed on exterior surface of bulb.
Provenance: Presented by the Marconi Corporation.
Collection Group: Marconi Collection
Material(s): Glass
steel
bakelite?
assorted metals.
Dimensions:
Height Width Depth Diameter Unit
80 30 mm

Narratives

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