
McVitie Weston valve collection, King valve

King valve, spherical glass envelope 1.7in diam, on std American base type 009, marked CINEPHONE 1190, (RMW/P57 - McVitie Weston number), by Workrite Manufacturing Company.
King valve, spherical glass envelope 1.7in diam, on std American base type 009, marked CINEPHONE 1190, (RMW/P57 - McVitie Weston number), by Workrite Manufacturing Company.