McVitie Weston valve collection, Mullard valve, type DU/40
- Made:
- circa 1928
- maker:
- Mullard Limited
Mullard valve, type DU/40, (RMW/A105 - McVitie Weston number), by Mullard Limited, c. 1928.
Mullard valve, type DU/40, (RMW/A105 - McVitie Weston number), by Mullard Limited, c. 1928.