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Balloon Envelope Radio Valve, 20th Century

Inventory Number: 92020

92020-2t 92020-1t

Date: 20th Century

Maker Details: Unknown

Inscription: None

Size: 115 mm in overall length (including base pins)

Materials: Glass, steel, bakelite, assorted metals.


Radio Valve (or Tube) with partially darkened glass balloon envelope, polished black bakelite base and four steel base pins.

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