| Owner: | Arkansas-Oklahoma Railroad |
| Type: | Box Car |
| AAR Class: | XM: Box car for general service equipped with side or side and end doors. |
| AAR Type: | B637 |
| Detail Info: | Unequipped Box Car, Inside Length: 69' to 79', cushion draft gear/underframe, Plug door, inside width 9ft 6in and over, Door opening 15ft and over |
| Plate: | G |
| Builder: | Gunderson |
| Max Gross Weight: | 286000 |
| Load Limit: | 207500 |
| Dry Capacity: | 7580 |
| Ext L/W/H: | 68' 4" / 10' 8" / 17' 0" |
| Int L/W/H: | 60' 9" / 9' 6" / 13' 2" |
| User Notes: | Gunderson 7577 |
