McVitie Weston valve collection, Ferranti valve, type L.P.4
- maker:
- Ferranti Limited
Ferranti valve, type L.P.4, grid pin missing, (RMW/D77 - McVitie Weston number), by Ferranti Limited.
Ferranti valve, type L.P.4, grid pin missing, (RMW/D77 - McVitie Weston number), by Ferranti Limited.