| Owner: | Union Pacific Railroad Company |
| Type: | Box Car |
| AAR Class: | XM: Box car for general service equipped with side or side and end doors. |
| AAR Type: | B414 |
| Detail Info: | Unequipped Box Car, Inside Length: 49' to 59', cushion draft gear/underframe, Sliding doors, inside width 9ft 6in and over, Door opening 10ft to 11ft |
| Plate: | C |
| Dry Capacity: | 5317 |
| User Notes: | ex-SLR 258 exx-BMS 429 {Berlin Mills paint} |
