McVitie Weston valve collection, Ediswan valve, type N.T.16
Ediswan valve, type N.T.16, marked Admiralty patt. 7432, serial No. 101, pinch marked 29, (RMW/J56 - McVitie Weston number), by Royal Ediswan.
Ediswan valve, type N.T.16, marked Admiralty patt. 7432, serial No. 101, pinch marked 29, (RMW/J56 - McVitie Weston number), by Royal Ediswan.