McVitie Weston valve collection, valve
Valve, tubular glass cell 0.5in diam by about 1.5in long in heavy metal plug-in case, (RMW/P20 - McVitie Weston number), by Unknown maker.
Valve, tubular glass cell 0.5in diam by about 1.5in long in heavy metal plug-in case, (RMW/P20 - McVitie Weston number), by Unknown maker.