McVitie Weston valve collection, Marconi valve, type U4
- Made:
- 1926
- maker:
- Marconi Company Limited
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© The Board of Trustees of the Science Museum
Marconi valve, type U4, (RMW/A51 - McVitie Weston number)
Science Museum Group
© The Board of Trustees of the Science Museum
Marconi valve, type U4, (RMW/A51 - McVitie Weston number), by Marconi Company Limited, 1926.
