McVitie Weston valve collection, Ediswan Ray Tube valve, type B
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.