McVitie Weston valve collection, Mullard valve, type S4VB
- maker:
- Mullard Limited
Mullard valve, type S4VB, marked Dummy, top connector terminal missing, (RMW/G89 - McVitie Weston number), by Mullard Limited.
Mullard valve, type S4VB, marked Dummy, top connector terminal missing, (RMW/G89 - McVitie Weston number), by Mullard Limited.