SP ASB-616 page: Renumberings
Renumberings:
These cabless booster variations of Baldwin AS-616 roadswitchers were renumbered a few times over their service lives.
SP 5501-5505:
| Original number | 1955 number | 1965 number |
| SP 5501 | SP 4901 | SP 4901 |
| SP 5502 | SP 4902 | SP 4902 |
| SP 5503 | SP 4903 | SP 4903 |
| SP 5505 | SP 4905 | SP 4905 |