McVitie Weston valve collection, STC valve, type 9D2
- Made:
- 1943
STC valve, type 9D2, envelope marked 9, base cap marked APW7450, (RMW/Y453A - McVitie Weston number), by Standard Telephones and Cables Limited, 1943.
STC valve, type 9D2, envelope marked 9, base cap marked APW7450, (RMW/Y453A - McVitie Weston number), by Standard Telephones and Cables Limited, 1943.