Catalogue
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Puratone Rubon Radio Valve, by Puratone Rubon, Britain, 1924
Inventory Number: 31417
Date: 1924
Maker Details: Signed by Puratone Rubon.
Inscription: "PURATONE RUBON VALVE BBC [LOGO]" printed on exterior surface of bulb.
Size: 110 mm in overall length (including base pins)
Materials: Glass, plastic, steel, assorted metals.
Notes:
Puratone Rubon Radio Valve (or Tube) with entirely silvered glass balloon envelope, black plastic? base and four steel base pins. BBC logo ("ENTIRELY BRITISH MANUFACTURE") was used between September 1924 and 1927 and gives a good indication of the date of origin.
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