McVitie Weston valve collection, GEC valve, type V.T. No.3
GEC valve, type V.T. No.3, pinch marked G.P.O. and 1918, glass envelope marked 159, (RMW/E124B - McVitie Weston number), by General Electric Company Limited.
GEC valve, type V.T. No.3, pinch marked G.P.O. and 1918, glass envelope marked 159, (RMW/E124B - McVitie Weston number), by General Electric Company Limited.