McVitie Weston valve collection, Mazda valve, type U.U.120/500
Mazda valve, type U.U.120/500, (RMW/A83B - McVitie Weston number), by British Thomson-Houston Company Limited.
Mazda valve, type U.U.120/500, (RMW/A83B - McVitie Weston number), by British Thomson-Houston Company Limited.