This thread makes me realize that I know NOTHING about airhorns. I just look at a photo of a given unit and see what is available out there that is the same or similar.
Any of these horns used by CN on their SW1200RS, F7Au, GP9, GP9RM, GP38-2, GP38-2W, GP40, GP40-2L, SD40, SD40-2W, RS18, C30M or M636's?
Any of these horns used by CP on their SW1200RS, GP7u, GP9, GP9u, GP38-2, SD40, SD40-2, SD40-2F, RS18, RS18u, C424, C630M, M630, or M636's?