NS DS-4-4-660:
This page is dedicated to the original Norfolk Southern's small fleet of Baldwin DS-4-4-660 yard switchers. The NS was the original owner of 3 DS-4-4-660 units.
Original orders:
| Orig. road numbers | model | Baldwin serial no. | build date | notes |
| NS 661-662 | DS-4-4-660 | 73361-73362 | 1/1947 | |
| NS 663 | DS-4-4-660 | 73365 | 5/1947 |
DS-4-4-660: NS 661 73361 1/1947 NS 662 73362 1/1947 NS 663 73365 5/1947