McVitie Weston valve collection, STC valve, type 4102D
- Made:
- 1926
STC valve, type 4102D, Pinch marked K346, (RMW/Y259A - McVitie Weston number), by Standard Telephones and Cables Limited, 1926.
STC valve, type 4102D, Pinch marked K346, (RMW/Y259A - McVitie Weston number), by Standard Telephones and Cables Limited, 1926.