Horn and photos courtesy Ron Chamberlain.
Side view of the MS1.
Factory tuning for the MS1 was: C#
Santa Fe is known to have used the MS1 on some of its Fairbanks Morse freight locomotives. The horn fell out of favor along with the rest of the M-series due to its high maintenance requirements. It may still be found occasionally on museum locomotives.
MS1 sound samples:Courtesy Ron Chamberlain:
Sample 1...428kB...27 seconds