McVitie Weston valve collection
- maker:
- Royal Ediswan
Ediswan general-purpose triode, type AR, B4 base, pinch marked A18, (RMW/B129D - McVitie Weston number), by Royal Ediswan.
Ediswan general-purpose triode, type AR, B4 base, pinch marked A18, (RMW/B129D - McVitie Weston number), by Royal Ediswan.