SP VO-1000 page: 1965 system renumbering
1965 Renumbering:
In late 1965, the SP began a program to renumber the majority of its locomotive fleet into a consolodated system without regard for reporting mark. However, the SSW units did retain their identity, but the numbers were assigned within the overall scheme.
SP 1850:
| 1965 numbers | Orig. numbers | notes |
| SP 1850 | SSW 1022 | assigned, but never applied |
SP 1855=1862:
| 1965 numbers | Orig. numbers | notes |
| SP 1855 | SP 1327 | assigned, but never applied |
| SP 1856 | SP 1375 | |
| SP 1857 | SP 1376 | |
| SP 1858 | SP 1372 | assigned, but never applied |
| SP 1859 | SP 1373 | |
| SP 1860 | SP 1380 | |
| SP 1861 | SP 1381 | |
| SP 1862 | SP 1382 |