McVitie Weston valve collection, Cosmos valve, type AC (Green Spot)
- Made:
- 1927
Cosmos valve, type AC (Green Spot), pinch marked /7422, (RMW/F21 - McVitie Weston number), by Metropolitan-Vickers Electrical Company Limited, 1927.
Cosmos valve, type AC (Green Spot), pinch marked /7422, (RMW/F21 - McVitie Weston number), by Metropolitan-Vickers Electrical Company Limited, 1927.