McVitie Weston valve collection, MOV/GEC valve, type NR51
MOV/GEC valve, type NR51, marked A4280, (RMW/Y584 - McVitie Weston number), by M-O Valve Co. Limited; General Electric Company Limited.
MOV/GEC valve, type NR51, marked A4280, (RMW/Y584 - McVitie Weston number), by M-O Valve Co. Limited; General Electric Company Limited.