McVitie Weston valve collection, Sylvania valve, type 12Z3
Sylvania valve, type 12Z3, marked C4, (RMW/A160 - McVitie Weston number), by Sylvania Electric Products Incorporated.
Sylvania valve, type 12Z3, marked C4, (RMW/A160 - McVitie Weston number), by Sylvania Electric Products Incorporated.