McVitie Weston valve collection, Mullard tetrode valve, type R
- Made:
- circa 1929
- maker:
- Mullard Limited
Mullard tetrode valve, type R, (RMW/G9 - McVitie Weston number), by Mullard Limited, c. 1929.
Mullard tetrode valve, type R, (RMW/G9 - McVitie Weston number), by Mullard Limited, c. 1929.