McVitie Weston valve collection, Marconi valve, type M.U.14
- maker:
- Marconi Company Limited
Marconi valve, type M.U.14, (RMW/A67 - McVitie Weston number), by Marconi Company Limited.
Marconi valve, type M.U.14, (RMW/A67 - McVitie Weston number), by Marconi Company Limited.