McVitie Weston valve collection, Cosmos valve, type S.P.18 (blue)
- Made:
- 1926
Cosmos valve, type S.P.18 (blue), marked 1.5v 0.3A, clear glass envelope, (RMW/C120 - McVitie Weston number), by Metropolitan-Vickers Electrical Company Limited, 1926.
Cosmos valve, type S.P.18 (blue), marked 1.5v 0.3A, clear glass envelope, (RMW/C120 - McVitie Weston number), by Metropolitan-Vickers Electrical Company Limited, 1926.