This truck was manufactured for the United States Railroad Administration. In 1918, the USRA ordered 67,000 freight cars with this truck. These included 25,000 50-ton single-sheathed box cars, 20,000 50-ton composite drop-bottom gondola cars and 22,000 55-ton steel twin hopper cars. These cars were bought by 53 American railroads.
Below is a link for the data sheet about this truck.
TMW-112 / TMW-212 Data Sheet