This 2-4-10 configured steam locomotive is known as the Texas configuration because of the arrangement of its wheels, and such locomotives were first used in the US back in 1919. What’s unique about Gerald Cacas‘s minifigure-scale train is that the wheels and tracks were not made using the typical LEGO train elements, but emulated using other, more-everyday parts.
There’s also a bit of detailing going on in the cab section of the train to give it that complete look:
It’s a 2-10-4