McVitie Weston valve collection, STC valve, type G10/240E
STC valve, type G10/240E, 3-arm pinch marked L.V.B. 63 D.D., (RMW/Y517 - McVitie Weston number), by Standard Telephones and Cables Limited.
STC valve, type G10/240E, 3-arm pinch marked L.V.B. 63 D.D., (RMW/Y517 - McVitie Weston number), by Standard Telephones and Cables Limited.