McVitie Weston valve collection, Mullard valve, type NT9X
- maker:
- Mullard Limited
Mullard valve, type NT9X, marked 201K, pinch marked 423, (RMW/J48A - McVitie Weston number), by Mullard Limited.
Mullard valve, type NT9X, marked 201K, pinch marked 423, (RMW/J48A - McVitie Weston number), by Mullard Limited.