McVitie Weston valve collection, Metrovick Amplion valve, type AML 6/25
Metrovick Amplion valve, type AML 6/25, pinch marked 13/77, (RMW/C133 - McVitie Weston number), by Metropolitan-Vickers Electrical Company Limited.
Metrovick Amplion valve, type AML 6/25, pinch marked 13/77, (RMW/C133 - McVitie Weston number), by Metropolitan-Vickers Electrical Company Limited.