McVitie Weston valve collection, STC valve, type 4069A
- Made:
- 1937
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LicenseSTC valve, type 4069A, top pinch marked DT4
Science Museum Group
© The Board of Trustees of the Science Museum
STC valve, type 4069A, top pinch marked DT4, 5-pin ceramic base with top cap for anode connection, (RMW/J155 - McVitie Weston number), by Standard Telephones and Cables Limited, 1937.
