McVitie Weston valve collection, valve, type ATS.25
Valve, type ATS.25, marked ZA.3496 K, 5-pin ceramic base marked HW41, in carton, (RMW/Y409B - McVitie Weston number), by Unknown maker.
Valve, type ATS.25, marked ZA.3496 K, 5-pin ceramic base marked HW41, in carton, (RMW/Y409B - McVitie Weston number), by Unknown maker.