McVitie Weston valve collection, valve, type R
Valve, type R, glass envelope marked - Repaired Valve G.W.I. Ltd., London, marked 1210, (RMW/H69 - McVitie Weston number), by Unknown maker.
Valve, type R, glass envelope marked - Repaired Valve G.W.I. Ltd., London, marked 1210, (RMW/H69 - McVitie Weston number), by Unknown maker.