This horn has the X designation on the tag. It is unsure what it stands for, but most assume "experimental". This horn is full orifice. Some RS Leslies have a tendency to squeal or miss from time to time. You can hear that in this audio.
Zanesville and Western Scenic Railroad (ex Buckeye Central Scenic Railroad, Conrail, Penn Central and Pennsylvania Railroad) EMD SW1 600 HP #8599 has a Leslie RS5TFX horn.
