This wagon is modeled on an early 20th century two bay hopper wagon that was used in North America. Although larger three bay hopper wagons eventually replaced these, this all-steel design played a key role in the industrial era of North America.
In game, these wagons will display a visible load whenever the inventory is not empty. If the load is applicable to a hopper wagon, such as dirt, sand, gravel or coal, the corresponding load will be visible. Otherwise, a generic “mixed materials” texture will be shown to indicate that the inventory is not empty but the cargo is likely not appropriate for a hopper wagon.