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McVitie Weston valve collection, Ediswan Ray Tube valve, type B
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Ediswan Ray Tube valve, type B, 5.5in diam screen, length 1ft 7in overall, (RMW/K29 - McVitie Weston number), by Royal Ediswan.
Ediswan Ray Tube valve, type B, 5.5in diam screen, length 1ft 7in overall, (RMW/K29 - McVitie Weston number), by Royal Ediswan.