McVitie Weston valve collection
- maker:
- Royal Ediswan
Ediswan delay switch for power supply, type D.L.S.I., B4 base, pinch marked 720A, (RMW/Y43 - McVitie Weston number), made by Royal Ediswan.
Ediswan delay switch for power supply, type D.L.S.I., B4 base, pinch marked 720A, (RMW/Y43 - McVitie Weston number), made by Royal Ediswan.