An absolutely superb small steam whistle with a centre valve suited to a narrow gauge locomotive or traction engine, this whistle has a 1/2" B S P male thread and comes with a machine and polished hardwood base for display. We have tested the whistle on compressed air and it works fine with no leaks. The whistle measures 6 1/4" inches tall plus 1" of thread, the bell diameter is 2" and operation arm is 5" long.
