McVitie Weston valve collection, STC valve, type 5A/152G
STC valve, type 5A/152G, anode marked WFN3P, (RMW/Y385 - McVitie Weston number), by Standard Telephones and Cables Limited.
STC valve, type 5A/152G, anode marked WFN3P, (RMW/Y385 - McVitie Weston number), by Standard Telephones and Cables Limited.