McVitie Weston valve collection, Marconi valve, type D.E.L.610
- maker:
- Marconi Company Limited
Marconi valve, type D.E.L.610, (RMW/C43 - McVitie Weston number), by Marconi Company Limited.
Marconi valve, type D.E.L.610, (RMW/C43 - McVitie Weston number), by Marconi Company Limited.