Is this not a 4-8-2 USRA Light Mountain?
im not an expert of american steam era, but in game it's called 4-12-2, or UP 9000
Ahhh .... then it's a 4-12-2 locomotive
You have written 4-12-12 ..... that's a mistake
Just count the wheels of the loco: 4 frontrunners, 12 driving wheels and 2 below the cabin