
McVitie Weston valve collection, Mazda valve, type AC/S2

Mazda valve, type AC/S2, metallising partially removed, (RMW/G78A - McVitie Weston number), by British Thomson-Houston Company Limited.
Mazda valve, type AC/S2, metallising partially removed, (RMW/G78A - McVitie Weston number), by British Thomson-Houston Company Limited.