McVitie Weston valve collection, Lissen valve, type P220
- Made:
- circa 1936
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© The Board of Trustees of the Science Museum
Lissen valve, type P220, stem marked P220 38
Science Museum Group
© The Board of Trustees of the Science Museum
Lissen valve, type P220, stem marked P220 38, pinch marked 542 041, (RMW/E58 - McVitie Weston number), by Lissen Limited, c. 1936.
