McVitie Weston valve collection, BTH valve, type B12
- Made:
- 1927
BTH valve, type B12, marked L.H.3, (RMW/C77B - McVitie Weston number), by British Thomson-Houston Company Limited, 1927.
BTH valve, type B12, marked L.H.3, (RMW/C77B - McVitie Weston number), by British Thomson-Houston Company Limited, 1927.