SP 6520-6596
These units were built as SP units and renumbered as part of the SP's 1965 systemwide locomotive renumberign plan.
1965 NUMBERS:
SP 6520-6596:
| 1965 road number | Orig. road number | notes |
| SP 6520 | SP 7408 | |
| SP 6521 | SP 7409 | |
| SP 6522 | SP 7410 | |
| SP 6523 | SP 7411 | |
| SP 6524 | SP 7412 | |
| SP 6525 | SP 7413 | |
| SP 6526 | SP 7414 | |
| SP 6527 | SP 7415 | |
| SP 6528 | SP 7416 | |
| SP 6529 | SP 7417 | |
| SP 6530 | SP 7418 | |
| SP 6531 | SP 7419 | |
| SP 6532 | SP 7420 | |
| SP 6533 | SP 7421 | |
| SP 6534 | SP 7422 | |
| SP 6535 | SP 7423 | |
| SP 6536 | SP 7424 | |
| SP 6537 | SP 7425 | |
| SP 6538 | SP 7426 | |
| SP 6539 | SP 7427 | |
| SP 6540 | SP 7428 | |
| SP 6541 | SP 7429 | |
| SP 6542 | SP 7430 | |
| SP 6543 | SP 7431 | |
| SP 6544 | SP 7432 | |
| SP 6545 | SP 7433 | |
| SP 6546 | SP 7434 | |
| SP 6547 | SP 7435 | |
| SP 6548 | SP 7436 | |
| SP 6549 | SP 7437 | |
| SP 6550 | SP 7438 | |
| SP 6551 | SP 7439 | |
| SP 6552 | SP 7440 | |
| SP 6553 | SP 7441 | |
| SP 6554 | SP 7442 | |
| SP 6555 | SP 7443 | |
| SP 6556 | SP 7444 | |
| SP 6557 | SP 7445 | |
| SP 6558 | SP 7446 | |
| SP 6559 | SP 7447 | |
| SP 6560 | SP 7448 | |
| SP 6561 | SP 7449 | |
| SP 6562 | SP 7450 | |
| SP 6563 | SP 7451 | |
| SP 6564 | SP 7452 | |
| SP 6565 | SP 7453 | |
| SP 6566 | SP 7454 | |
| SP 6567 | SP 7455 | |
| SP 6568 | SP 7456 | |
| SP 6569 | SP 7457 | |
| SP 6570 | SP 7458 | |
| SP 6571 | SP 7459 | |
| SP 6572 | SP 7460 | |
| SP 6573 | SP 7461 | |
| SP 6574 | SP 7462 | |
| SP 6575 | SP 7463 | |
| SP 6576 | SP 7464 | |
| SP 6577 | SP 7465 | |
| SP 6578 | SP 7466 | |
| SP 6579 | SP 7467 | |
| SP 6580 | SP 7468 | |
| SP 6581 | SP 7469 | |
| SP 6582 | SP 7470 | |
| SP 6583 | SP 7471 | |
| SP 6584 | SP 7472 | |
| SP 6585 | SP 7473 | |
| SP 6586 | SP 7474 | |
| SP 6587 | SP 7475 | |
| SP 6588 | SP 7476 | |
| SP 6589 | SP 7477 | |
| SP 6590 | SP 7478 | |
| SP 6591 | SP 7479 | |
| SP 6592 | SP 7480 | |
| SP 6593 | SP 7481 | |
| SP 6594 | SP 7482 | |
| SP 6595 | SP 7483 | |
| SP 6596 | SP 7484 |