McVitie Weston valve collection, GEC valve, type 6RR3
GEC valve, type 6RR3, marked 11, pinch marked 4875, (RMW/J99 - McVitie Weston number), by General Electric Company Limited.
GEC valve, type 6RR3, marked 11, pinch marked 4875, (RMW/J99 - McVitie Weston number), by General Electric Company Limited.