McVitie Weston valve collection, Osram valve, type B21

Made:
c. 1933
maker:
Osram

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Osram valve, type B21, marked DUMMY, glass envelope cracked, (RMW/Y75 - McVitie Weston number), by Osram, c. 1933.

Details

Category:
Electronic Components
Object Number:
1972-141/1584
type:
valve
credit:
STC plc