Catalogue
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Balloon Envelope Radio Valve, Early 20th Century
Inventory Number: 13172
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.
Notes:
Radio Valve (or Tube) with partially silvered glass balloon envelope, steel-plated brown bakelite? base and four steel base pins.
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