McVitie Weston valve collection, Ediswan valve, type P425
Ediswan valve, type P425, marked: approved sample, (RMW/C111 - McVitie Weston number), by Royal Ediswan.
Ediswan valve, type P425, marked: approved sample, (RMW/C111 - McVitie Weston number), by Royal Ediswan.