| Owner: | Williamette Industries Incorporated |
| Type: | Box Car |
| AAR Class: | XM: Box car for general service equipped with side or side and end doors. |
| AAR Type: | B437 |
| Detail Info: | Unequipped Box Car, Inside Length: 49' to 59', cushion draft gear/underframe, Plug door, inside width 9ft 6in and over, Door opening 15ft and over |
| Plate: | B |
| Max Gross Weight: | 220000 |
| Load Limit: | 151100 |
| Dry Capacity: | 5040 |
| Ext L/W/H: | 58' 0" / 10' 8" / 14' 11" |
| Int L/W/H: | 50' 4" / 9' 6" / 10' 6" |
| User Notes: | Ex-UP |
