Summary

General purpose triode with a 1 volt filament that consumes 250 mA.
The original design of this valve dates back to the First World War and it was manufactured with various improvements through the 1920s and 1930s. During 1923-24 it was made in England by Mullard and labelled 215A 'Wecovalve', It was also sold there by British Western Electric as the 4215A.
In 1925 British Western Electric became Standard Telephones and Cables Ltd. (STC). They marketed their valves at that time under the name 'Standard'. This valve was renamed G125A and was also supplied with a conventional European 4 pin base as a G215. The dual marking of this example indicates that it must have been made at around the time of the name change.
This valve was the same as the Western Electric 215A and the British Western Electric 4215A. It still has the 4215A marking on the bulb.
Manufacturer: Standard Telephones and Cables, England.

Physical Description

Small tubular bulb with exhaust tip on top with base with 4 contacts ('nubs' or soldered bumps).

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