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Siemens & Halske Experimental Radio Valve, by Siemens & Halske, Germany, c. 1917
Inventory Number: 50748
Number of documents: 1
Document Type: Miscellaneous Note
Document Heading: Technical Details
Text:
This valve is probably an experimental laboratory triode, signed by Siemens & Halske. Probably a type 'A' valve fitted, and dated to c. 1917.
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