SOU S12:
This page is dedicated to SOU's small fleet of Baldwin S12 yard switchers. The SOU was the original owner of 10 S12 units.
Original orders:
| Orig. road numbers | Baldwin serial no. | build date | notes |
| SOU 2290-2299 | 75603-75612 | 7/1952 |
S12: SOU 2290 75603 7/1952 SOU 2291 75604 7/1952 SOU 2292 75605 7/1952 SOU 2293 75606 7/1952 SOU 2294 75607 7/1952 SOU 2295 75608 7/1952 SOU 2296 75609 7/1952 SOU 2297 75610 7/1952 SOU 2298 75611 7/1952 SOU 2299 75612 7/1952