McVitie Weston valve collection, MOV/GEC valve, type D.E.3.
MOV/GEC valve, type D.E.3., marked K234, (RMW/E136 - McVitie Weston number), by M-O Valve Co. Limited; General Electric Company Limited.
MOV/GEC valve, type D.E.3., marked K234, (RMW/E136 - McVitie Weston number), by M-O Valve Co. Limited; General Electric Company Limited.