McVitie Weston valve collection, Mullard valve, type R7
- maker:
- Mullard Limited
Mullard valve, type R7, etched no. 5427, (RMW/B76 - McVitie Weston number), by Mullard Limited.
Mullard valve, type R7, etched no. 5427, (RMW/B76 - McVitie Weston number), by Mullard Limited.