SP S2 page
The SP owned a total of 122 ALCO S2 switch engines. Seventy-four units for the SP and forty-eight units for the T&NO were rostered.
The SP purchased S2's new as follows:
SP 1300-1309:
| Orig. road numbers | ALCO const. no. | build date |
| SP 1300 | 69521 | 5/1941 |
| SP 1301 | 69523 | 5/1941 |
| SP 1302-1306 | 69526-69530 | 5-6/1941 |
| SP 1307 | 69532 | 6/1941 |
| SP 1308 | 69534 | 7/1941 |
| SP 1309 | 69536 | 7/1941 |
SP 1330-1344:
| SP 1330-1331 | 69676-69677 | 3/1942 |
| SP 1332-1333 | 69724-69725 | 5/1942 |
| SP 1334-1344 | 69890-69900 | 5-6/1942 |
SP 1345-1362:
| SP 1345 | 69951 | 3/1943 |
| SP 1346 | 69957 | 3/1943 |
| SP 1347-1348 | 69960-69961 | 3/1943 |
| SP 1349-1354 | 69964-69969 | 5-6/1943 |
| SP 1355-1360 | 69612-69617 | 6=10/1943 |
| SP 1361 | 69801 | 10/1943 |
| SP 1362 | 69804 | 11/1943 |
SP 1363-1370:
| SP 1363-1367 | 69805-69809 | 4=6/1944 |
| SP 1368 | 69970 | 6/1944 |
| SP 1369 | 72697 | 6/1944 |
| SP 1370 | 72700 | 6/1944 |
SP 1386-1392:
| SP 1386-1392 | 72718-72724 | 7-8/1944 |
SP 1426-1441:
| SP 1426-1427 | 77027-77028 | 2/1950 |
| SP 1428-1433 | 77035-77040 | 2/1950 |
| SP 1434-1441 | 77042-77049 | 2-3/1950 |
T&NO 30-38:
| Orig. road numbers | ALCO const. no. | build date |
| T&NO 30-31 | 69958-69959 | 3/1943 |
| T&NO 32-33 | 69962-69963 | 5/1943 |
| T&NO 34-35 | 69802-69803 | 10/1943 |
| T&NO 36-38 | 72701-72703 | 6/1944 |
T&NO 39-61:
| T&NO 39-42 | 73919-73922 | 1-2/1947 |
| T&NO 43-47 | 73926-73930 | 2/1947 |
| T&NO 48 | 73933 | 3/1947 |
| T&NO 49-53 | 74966-74970 | 3/1947 |
| T&NO 54-61 | 74974-74981 | 4-5/1947 |
T&NO 62-71:
| T&NO 62-71 | 76751-76760 | 4/1949 |
T&NO 89-94:
| T&NO 89-94 | 77029-77034 | 2/1950 |