McVitie Weston valve collection, Mullard valve, type S.W.1
- maker:
- Mullard Limited
Mullard valve, type S.W.1, marked 31, glass bulb smashed, (RMW/J112 - McVitie Weston number), by Mullard Limited.
Mullard valve, type S.W.1, marked 31, glass bulb smashed, (RMW/J112 - McVitie Weston number), by Mullard Limited.