| Owner: | Southern Pacific |
| Type: | Box Car |
| AAR Class: | XL: Loader Equipped. Box car similar in design to "XM", with steel perforated side walls or equipped with interior side rails for securement of certain types of lading and/or permanently attached movable bulkheads. |
| AAR Type: | A633 |
| Detail Info: | Equipped Box Car, Inside Length: 69' to 79', cushion draft gear/underframe, Sliding door, opening greater than 11 feet |
| Plate: | F |
| SP Class: | B-100-39 |
| User Notes: | Blt 1-77 |
