McVitie Weston valve collection, Tungsram valve, type P26/500
Tungsram valve, type P26/500, (RMW/Y32 - McVitie Weston number), by Tungsram Electric Lamp Works (Gt. Britain) Ltd..
Tungsram valve, type P26/500, (RMW/Y32 - McVitie Weston number), by Tungsram Electric Lamp Works (Gt. Britain) Ltd..