What Bowser Cal Scale airhorn or Details West airhorn would be correct for GP7 SLSF 570? GP7 SLSF 620 has a similar airhorn with all the chimes facing forward also. I tried to upload a picture but file was to big. It is in the Frisco Archive. Thanks, Matt
Most all the pictures of SLSF 570 indicate it was outfitted with a Leslie RS5T-RF. This would be represented by Details West DTW-191. It is well represented in the Frisco Archive. http://frisco.org/mainline/?s=Gp7+570