Wade Bequest collection of valves: R-type triode radio valve, by Marconi-Osram

maker:
Marconi Osram Valve Company Limited
SMG00237667

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SMG00237667
Science Museum Group
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Wade Bequest collection of valves: R-type triode radio valve, by Marconi-Osram. With B4-3 base and top seal.

Details

Category:
Collection Unassigned
Object Number:
1972-343/33
credit:
Wade, J.C.F.