McVitie Weston valve collection, STC valve, type 4036A
- Made:
- 1931
STC valve, type 4036A, pinch marked 145, grid support broken at one end, (RMW/J143A - McVitie Weston number), by Standard Telephones and Cables Limited, 1931.
STC valve, type 4036A, pinch marked 145, grid support broken at one end, (RMW/J143A - McVitie Weston number), by Standard Telephones and Cables Limited, 1931.