McVitie Weston valve collection
- maker:
- Royal Ediswan
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Science Museum Group
© The Board of Trustees of the Science Museum
Ediswan delay switch for power supply, type D.L.S.I
Science Museum Group
© The Board of Trustees of the Science Museum
Ediswan delay switch for power supply, type D.L.S.I., B4 base, (RMW/Y41 - McVitie Weston number), made by Royal Ediswan.
