This is the body of a 3-bogey boxcar circa 1850 with one door per side with and changeable lettering.
The third bogey slid from side to side. This is not a car for sharp curves which is probably why they didn't last very long.
To assemble this car in Surveyor:
1. Place this item on the tracks.
2. Place a 3_bogey_boxcar_bolster (kuid2:210518:6556:1) on the tracks beyond the car body end without a bogey.
3. Rotate the bolster if necessary.
4. Move the bolster under the car.
5. When properly positioned there will only be one red and one green arrow, the end bogies will be at equal distances
from the ends of the car, the third bogey will be in the center, all bogies will track the center of the rails, and the car will
move as a unit..