McVitie Weston valve collection, STC Micromesh valve, type HLA1
- Made:
- circa 1930
STC Micromesh valve, type HLA1, blue printed label, glass loose, (RMW/F54 - McVitie Weston number), by Standard Telephones and Cables Limited, c. 1930.
STC Micromesh valve, type HLA1, blue printed label, glass loose, (RMW/F54 - McVitie Weston number), by Standard Telephones and Cables Limited, c. 1930.