SOO 6600-6623:
SOO 6600-6601 - built 12/1979 - EMD serial numbers 797307-1 thru 797307-2:
| SOO 6600 | SOO 6601 |
SOO 6602-6605 - built 4/1980 - EMD serial numbers 796327-1 thru 796327-4:
| SOO 6602 | SOO 6603 | SOO 6604 | ||
| SOO 6605 |
SOO 6606-6613 - built 4-5/1980 - EMD serial numbers 797328-1 thru 797328-8:
| SOO 6606 | SOO 6607 | SOO 6608 | SOO 6609 | |
| SOO 6610 | SOO 6611 | SOO 6612 | SOO 6613 |
SOO 6614-6616 - built 3/1981 - EMD serial numbers 797393-1 thru 797393-3:
| SOO 6614 | ||||
| SOO 6615 | SOO 6616 |
SOO 6617 - rebuilt 4/1983 - EMD serial numbers 8270834-1 - rebuilt from SOO 6600:
| SOO 6617 |
SOO 6618-6623 - built 7/1984 - EMD serial numbers 827082-1 thru 827082-6:
| SOO 6618 | SOO 6619 | |||
| SOO 6620 | SOO 6621 | SOO 6622 | SOO 6623 |