McVitie Weston valve collection, Marconi valve, type L610
- maker:
- Marconi Company Limited
Marconi valve, type L610, pinch marked L6, (RMW/C48 - McVitie Weston number), by Marconi Company Limited.
Marconi valve, type L610, pinch marked L6, (RMW/C48 - McVitie Weston number), by Marconi Company Limited.