McVitie Weston valve collection
- Made:
- circa 1930
Micromesh VM RF pentode valve, type 9.A.1, B5+st base, hemispherical top, (RMW/Y316B - McVitie Weston number), by Standard Telephones and Cables Limited, c. 1930.
Micromesh VM RF pentode valve, type 9.A.1, B5+st base, hemispherical top, (RMW/Y316B - McVitie Weston number), by Standard Telephones and Cables Limited, c. 1930.