EMC #10 – 14, Mack #50 – 52, #75, AGIER #99 and 100, and EMC (1st) #125: used Wabco B-6 or A-6 (horn A) air horns, which were mounted in different locations on the roofs.
GE 44 Ton: #60 – 62: had one Wabco B-6 or A-6 (horn A) mounted left of center in front of the exhaust stack.
GE U23B: #501 (2nd) thru #512 (2nd): all had Leslie S-3’s (horn E) mounted on centerline of roof.