McVitie Weston valve collection, STC valve, type V230A/1K
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STC valve, type V230A/1K, marked LUI 31
Science Museum Group
© The Board of Trustees of the Science Museum
STC valve, type V230A/1K, marked LUI 31, (RMW/Y56 - McVitie Weston number), by Standard Telephones and Cables Limited.
