Per the October 1964 N&W Locomotive Equipment Book from the Office of the General Manager Motive Power and Equipment, Roanoke, VA Road # Horn(s) Type N&W 500-521: Leslie S-5-TR N&W 620-914: Leslie S-5-TR or Nathan P-135-R-24 ex-NKP 2448-2534 & 2800-2814: Leslie S-2-M, S-25 ex-Wab 3484-3495 Nathan M-3 -R1 Ed Painter Jr