VO 1000 Air Horn

I have just installed a Sound Traxx decoder into a Stewart-Bowser Baldwin VO1000 in a Frisco paint scheme. I have searched the net and have been unable to determine what air horn the Frisco used on this locomotive. Does anyone know or where could I find out?

http://www.frisco.org/cmps_index.php

When in doubt, most 1st generation diesels were delivered with single chime or “blat” airhorns. That may be what your Stewart model has (my undec VO-1000 did). Multi-chime airhorns didn’t come along until maybe the later fifties, but some first generation diesels kept their original horns til retirement.

Thanks. That sounds very reasonable. motopac