McVitie Weston valve collection, Marconi valve, type DEH 612
- maker:
- Marconi Company Limited
Marconi valve, type DEH 612, etched 150M, (RMW/C45 - McVitie Weston number), by Marconi Company Limited.
Marconi valve, type DEH 612, etched 150M, (RMW/C45 - McVitie Weston number), by Marconi Company Limited.