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Balloon Envelope Radio Valve, Early 20th Century

Inventory Number: 13172

13172-1t 13172-2t

Date: Early 20th Century

Maker Details: Unknown

Inscription: "S.V.10 2V 02R" printed on exterior surface of bulb.

Size: 100 mm in overall length (including base pins)

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


Radio Valve (or Tube) with partially silvered glass balloon envelope, steel-plated brown bakelite? base and four steel base pins.

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