SP 4600-4603
These cabbed "cow" units were the delivered drawbar-connect with cabless "calf" units to form what EMD referred to as a TR6 set. The drawbars were quickly replaced with standard couplers. The first set was demonstrator units EMD 1600 and 1600B purchased by the SP.
SP 4600 - 11/1950 - construction number: 13549 - Demonstrator EMD 1600
| SP 4600 |
SP 4601-4603 - 10/1951 - construction numbers: 15084-15086
| SP 4601 | SP 4602 | SP 4603 |