Wade Bequest collection of valves: early triode radio valve by Marconi-Osram

maker:
Marconi Osram Valve Company Limited

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Wade Bequest collection of valves: early directly-heated triode radio valve by Marconi-Osram. With B4-3 base and top seal.

Details

Category:
Collection Unassigned
Object Number:
1972-343/23
credit:
Wade, J.C.F.

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