I'm looking to locate a photo or good description of the horn(s) used on the PRR SD7 class ES15a. These are the two used in southern Indiana at Madison Hill. I've got no good pix to show this detail. Do we know at what point the Penn went from single bell horns to multiple chimes for freight service? IIRC, the GEEP 9 orders starting in '55 used a three chime horn, but I don't know the type. Thanks!
Original Post
