McVitie Weston valve collection, STC valve, type 4061A
- Made:
- 1937
STC valve, type 4061A, pinch marked DW130, glass envelope loose, (RMW/J154 - McVitie Weston number), by Standard Telephones and Cables Limited, 1937.
STC valve, type 4061A, pinch marked DW130, glass envelope loose, (RMW/J154 - McVitie Weston number), by Standard Telephones and Cables Limited, 1937.