McVitie Weston valve collection, Marconi Catkin valve, type MH4
- Made:
- circa 1933
- maker:
- Marconi Company Limited
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LicenseMarconi Catkin valve, type MH4
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Marconi Catkin valve, type MH4, (RMW/F11 - McVitie Weston number), by Marconi Company Limited, c.1933.