McVitie Weston valve collection, STC Micromesh valve, type Pen.A.1
- Made:
- 1930
STC Micromesh valve, type Pen.A.1, pinch marked AAWN T, (RMW/Y352 - McVitie Weston number), by Standard Telephones and Cables Limited, 1930.
STC Micromesh valve, type Pen.A.1, pinch marked AAWN T, (RMW/Y352 - McVitie Weston number), by Standard Telephones and Cables Limited, 1930.