McVitie Weston valve collection, MOV/GEC valve, type V.T. 5B
MOV/GEC valve, type V.T. 5B, double-ended glass valve, 13in long overall, Serial No. 348, pinch marked 881, anode marked 480, glass filament tubes broken, (RMW/J59A - McVitie Weston number), by M-O Valve Co. Limited; General Electric Company Limited.