Edison Swan thermionic triode valve in cardboard box
AR.06 dull emitting low temperature valve
Details
- Category:
- Radio Communication
- Object Number:
- Y7001.709
- Materials:
- glass, plastic (unidentified), metal (unknown) and cardboard
- Measurements:
-
overall: 95 mm 35 mm,
- type:
- thermionic valve and triode valve
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