McVitie Weston valve collection, ETA (Electrical Trading Association) valve, type 58
ETA (Electrical Trading Association) valve, type 58, pinch marked USSG, cap marked ETA 58, (RMW/G118 - McVitie Weston number), by Unknown maker.
ETA (Electrical Trading Association) valve, type 58, pinch marked USSG, cap marked ETA 58, (RMW/G118 - McVitie Weston number), by Unknown maker.