Chicago & Southern Airlines
|
| Registration | Type | Serial # | Service Dates |
| N86521 | 649A | 2642 | 10/50 to 05/53 |
| N86522 | 649A | 2653 | 10/50 to 05/53 |
| N86523 | 649A | 2659 | 11/50 to 05/53 |
| N86524 | 649A | 2660 | 02/51 to 05/53 |
| N86525 | 649A | 2662 | 02/51 to 05/53 |
| N86535 | 749A | 2673 | 05/51 to 05/53 |