Baldwin S12:
This page is dedicated to Baldwin's model S12 yard switchers. Baldwin built 451 S12 units.
Domestic Orders:
| ABB 27 | S12 | 75028 | 5/1951 | Akron & Barberton Belt Railroad |
| ABB 28 | S12 | 75316 | 7/1952 | Akron & Barberton Belt Railroad |
| APA 600 | S12 | 75616 | 6/1952 | Apache Railway |
| (ARMCO) 706 | S12 | 76091 | 2/1955 | American Rolling Mill Company |
| (ASARCO) 1954-1955 | S12 | 75544-75545 | 4/1952 | American Smelting & Refining Company |
| A&WP 678 | S12 | 75280 | 7/1951 | |
| (BLW) 1200-1201 | S12 | 75935-75936 | 7/1953 | demonstrators; Baldwin; to RI 758-759 |
| B&O 463-467 | S12 | 75961-75965 | 11/1953 | |
| (CAHCLA) 203 | S12 | 75141 | 9/1951 | Calumet & Hecla Mining Company |
| CofG 311-314 | S12 | 75814-75817 | 3-4/1953 | |
| CNJ 1053-1055 | S12 | 75025-75027 | 6/1951 | |
| CNJ 1056-1059 | S12 | 75058-75061 | 6/1951 | |
| C&NW 1073-1076 | S12 | 75064-75067 | 7/1951 | |
| C&NW 1106-1108 | S12 | 75194-75196 | 9/1952 | |
| C&NW 1109 | S12 | 75682 | 9/1952 | |
| C&NW 1117-1121 | S12 | 75394-75398 | 6/1953 | |
| C&NW 1126-1128 | S12 | 76025-76027 | 7/1954 | |
| COPR 200 | S12 | 75068 | 7/1951 | Copper Range Railroad |
| DAFX 1841-1842 | S12 | 75703-75704 | 12/1952 | United States Air Force |
| ERIE 617-618 | S12 | 74875-74876 | 2/1951 | |
| ERIE 619-628 | S12 | 75672-75681 | 4-5/1952 | |
| (ERIEMC) 400-402 | S12 | 76116-76118 | 10/1953 | Erie Mining Company |
| (ERIEMC) 403 | S12 | 76125 | 12/1955 | Erie Mining Company; used for testing; sold 10/1956 |
| GN 24-28 | S12 | 75818-75822 | 2/1953 | |
| KCS 1160-1163 | S12 | 75054-75057 | 4/1951 | |
| LV 230-233 | S12 | 74952-74955 | 9/1950 | |
| LV 234-239 | S12 | 74960-74965 | 9-10/1950 | |
| LV 240-243 | S12 | 79456-74959 | 10/1950 | |
| MGA 400-406 | S12 | 75797-75803 | 11/1952 | Monongahela Railway |
| MGA 407-418 | S12 | 75838-75849 | 5-7/1953 | Monongahela Railway |
| MGA 419-426 | S12 | 76010-76017 | 3-7/1954 | Monongahela Railway |
| (MICHLS) 116-117 | S12 | 75959-75960 | 11-12/1953 | Michigan Limestone |
| 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 | 75967-76974 | 12/1953-1/1954 | |
| MKT 1201-1210 | S12 | 75504-75513 | 9-12/1951 | |
| MKT 1211-1212 | S12 | 75183-75184 | 6/1952 | |
| MKT 1213-1215 | S12 | 75191-75193 | 6/1952 | |
| MP 9200-9219 | S12 | 75033-75052 | 5-9/1951 | |
| MP 9220-9226 | S12 | 75531-75537 | 3-4/1952 | sub-lettered International-Great Northern |
| MP 9227-9229 | S12 | 75313-75315 | 4/1952 | sub-lettered St. Louis, Brownsville & Mexico |
| MP 9230-9232 | S12 | 75528-75530 | 4/1952 | sub-lettered International-Great Northern |
| MP 9233-9239 | S12 | 75827-75833 | 4-5/1953 | sub-lettered Union Railway of Memphis |
| MR 30-31 | S12 | 75912-75913 | 10/1953 | McCloud River Railroad |
| NOPB 60-61 | S12 | 76120-76121 | 12/1955 | |
| NYC 9308-9310 | S12 | 75275-75277 | 10/1951 | |
| NYC 9311-9328 | S12 | 75546-75563 | 6-7/1952 | |
| (OLIRMC) 933 | S12 | 75053 | 6/1951 | Oliver Iron Mining Company |
| PBR 345-347 | S12 | 75234-75236 | 9/1951 | Patapsco & Back Rivers Railroad |
| PRR 8100-8104 | S12 | 75945-75949 | 2/1954 | |
| PRR 8732-8768 | S12 | 75631-75655 | 9-10/1952 | |
| PRR 8769-8772 | S12 | 75659-75662 | 12/1952 | |
| PRR 8773-8775 | S12 | 75656-75658 | 12/1952 | |
| PRR 8777-8796 | S12 | 75292-75311 | 12/1951-2/1952 | |
| PRR 8976-8993 | S12 | 74857-74874 | 1-3/1951 | |
| PRSL 6017-6021 | S12 | 75930-75934 | 6-7/1953 | Pennsylvania-Reading Seashore Lines |
| PRSL 6028-6033 | S12 | 76126-76131 | 4/1956 | Pennsylvania-Reading Seashore Lines |
| (RAYON) 201-202 | S12 | 76136-76137 | 7/1956 | Rayoneir, Inc. |
| SAL 1462-1465 | S12 | 75142-75145 | 1/1952 | |
| SAL 1476-1481 | S12 | 75759-75764 | 1/1953 | |
| SERA 40 | S12 | 76092 | 2/1955 | Sierra Railroad |
| SERA 42 | S12 | 76093 | 2/1955 | Sierra Railroad |
| SOO 313-314 | S12 | 75617-75618 | 3/1952 | |
| SOU 2290-2299 | S12 | 75603-75612 | 7/1952 | |
| SP 1442-1445 | S12 | 74877-74880 | 1/1951 | |
| SP 1446-1455 | S12 | 74970-74979 | 1-2/1951 | |
| SP 1456-1463 | S12 | 75017-75024 | 3-4/1951 | |
| SP 1492-1506 | S12 | 75774-75788 | 10-12/1952 | |
| SP 1507-1513 | S12 | 75789-75795 | 2/1953 | |
| SP 1539-1550 | S12 | 75914-75925 | 9-10/1953 | |
| TCIX 1200-1204 | S12 | 75012-75016 | 10/1950 | Tennessee Coal, Iron & Railroad Company |
| TCIX 1205-1207 | S12 | 75029-75031 | 5/1951 | Tennessee Coal, Iron & Railroad Company |
| T&NO 105-107 | S12 | 75613-75615 | 2/1952 | |
| TRRA 1250-1253 | S12 | 75688-75691 | 8/1952 | Terminal Railroad Association of St. Louis |
| TVAX 1-2 | S12 | 75601-75602 | 7/1952 | Tennessee Valley Authority |
| TVAX 3 | S12 | 75937 | 7/1954 | Tennessee Valley Authority |
| TVAX 200 | S12 | 75312 | 1/1952 | Tennessee Valley Authority |
| USAX 65-00391 | S12 | 75796 | 2/1953 | United States Army |
| USNX 65-00292:293 | S12 | 75289-75290 | 12/1951 | United States Navy |
| USNX 65-00315 | S12 | 75291 | 12/1951 | United States Navy |
| USNX 65-00365:374 | S12 | 75705-75714 | 11-12/1952 | United States Navy |
| (USSTL) 33-35 | S12 | 76138-76140 | 8/1956 | US Steel Corporation; Geneva Steel Works |
| (USSTL) GE1 | S12 | 75281 | 7-9/1951 | US Steel Corporation; Homestead Steel Works |
| (USSTL) GE2-GE5 | S12 | 75282-75285 | 7-9/1951 | US Steel Corporation; Morrisville, PA Works |
| (USSTL) GE6-GE8 | S12 | 75286-75288 | 3/1952 | US Steel Corporation; Morrisville, PA Works |
| (USSTL) GE17-GE18 | S12 | 75542-75543 | 2/1952 | US Steel Corporation; Morrisville, PA Works |
| WAB 305-306 | S12 | 75062-75063 | 4/1951 | |
| WAB 307-309 | S12 | 75823-75825 | 2/1953 |