This is a coach made for my Santa Fe Super Chief train. At 8 studs wide and 50 studs long the car is much larger than the standard LEGO Super Chief coach, which is 6x34 studs. None the less, the car is a few studs shorter than it should be, but the full length car, which would be at least 58 studs long, was a bit too long.

The trucks on this car and on the obervation car are longer and more detailed than the standard LEGO Super Chief trucks. Addtionally, the undercarriage has been substantially modified. Instead of using stickers to suggest the presence of details, this model has details on the bottom. There are tanks and grill tiles to suggest holding tanks and heat exchangers for things like potable water and air-conditioning.