McVitie Weston valve collection, STC valve, type G150/2D
STC valve, type G150/2D, pinch marked LT2244, (RMW/Y516 - McVitie Weston number), by Standard Telephones and Cables Limited.
STC valve, type G150/2D, pinch marked LT2244, (RMW/Y516 - McVitie Weston number), by Standard Telephones and Cables Limited.