McVitie Weston valve collection, valve, type X.21
Valve, type X.21, cylindrical glass envelope 1.4in diam x 1.7in long on std Brit 4-pin base, (RMW/P51 - McVitie Weston number), by Unknown maker.
Valve, type X.21, cylindrical glass envelope 1.4in diam x 1.7in long on std Brit 4-pin base, (RMW/P51 - McVitie Weston number), by Unknown maker.