MILW S12 Locos:
This page is dedicated to MILW's fleet of S12 yard switchers. The MILW was the original owner of 21 S12 units.
MILW units:
Original orders:
| Orig. road numbers | model | Baldwin serial no. | build date | notes |
| MILW 1905-1909 | S12 | 75007-75011 | 11/1950 | |
| MILW 1910-1914 | S12 | 75146-75150 | 11/1951 | |
| MILW 1915-1916 | S12 | 75278-75279 | 11/1951 | |
| MILW 1917 | S12 | 75701 | 10/1952 | |
| MILW 1918-1925 | S12 | 75967-75974 | 12/1953-1/1954 |
S12: MILW 1905 75007 11/1950 MILW 1906 75008 11/1950 MILW 1907 75009 11/1950 MILW 1908 75010 11/1950 MILW 1909 75011 11/1950 MILW 1910 75146 11/1951 MILW 1911 75147 11/1951 MILW 1912 75148 11/1951 MILW 1913 75149 11/1951 MILW 1914 75150 11/1951 MILW 1915 75278 11/1951 MILW 1916 75279 11/1951 MILW 1917 75701 10/1952 MILW 1918 75967 12/1953-1/1954 MILW 1919 75968 12/1953-1/1954 MILW 1920 75969 12/1953-1/1954 MILW 1921 75970 12/1953-1/1954 MILW 1922 75971 12/1953-1/1954 MILW 1923 75972 12/1953-1/1954 MILW 1924 75973 12/1953-1/1954 MILW 1925 75974 12/1953-1/1954