McVitie Weston valve collection, STC Micromesh valve, type R3
- Made:
- 1938
STC Micromesh valve, type R3, (RMW/A147 - McVitie Weston number), by Standard Telephones and Cables Limited, 1938.
STC Micromesh valve, type R3, (RMW/A147 - McVitie Weston number), by Standard Telephones and Cables Limited, 1938.