McVitie Weston valve collection, Siemens valve, type V120/201po
Siemens valve, type V120/201po, double end glass envelope with metal end-caps, E.S. for filament, stub for anode, marked 333 099, anode stamped 1099, (RMW/J163 - McVitie Weston number), by Siemens.
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- STC plc
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