| Owner: | Chicago & Northwestern |
| Type: | Box Car |
| AAR Class: | XM: Box car for general service equipped with side or side and end doors. |
| AAR Type: | B304 |
| Detail Info: | Unequipped Box Car, Inside Length: 49' to 59', Sliding doors, inside width less than 9ft 6in, Door opening 10ft to 11ft |
| User Notes: | Ex-ROCK 62581 (Single-Door; 5261 CU FT; "Waffle Box") |
