61 units
8504
8507
8510
8514
8516
8519-8520
8522
8525-8526
8528
8530
8532-8533
8537
8540-8541
8547
8549
8551-8554
8558
8563
8565-8568
8575-8576
8582
8586
8588
8590
8595-8597
8601
8603-8605
8608
8610-8611
8616
8620
8623-8624
8626
8628-8629
8635
8641
8643
8661
8665
8667
-8500-8524 built in 1983 as SBD 8500-8524; 8512 wrecked
-8525-8552 built in 1984 as SBD 8525-8552
-8553-8575 built in 1984 as C&O 8553-8575
-8576-8595 built in 1984 as B&O 8576-8595
-8596-8602 built in 1984 as SBD 8596-8602
-8603-8623 built in 1985 as SBD 8603-8623
-8624-8643 built in 1985 as C&O 8624-8643; 8638 first to be reclassified as "SD50-2"
-8644-8659 built in 1983 as CR 6703-05,09,11,18-20,25,26,28,31,32,36,38,39
-8660-8676 built in 1984 as CR 6740,41,44,46,47,51,56-60,63,64,67,68,71,79
-8677-8699 lease expired, no longer on CSX - to NREX 8677-8699.
-some units being downgraded to "SD50-2" - 3000 HP