A total of 20 locomotives were built under USRA control, with the production split between the Baldwin Locomotive Works and the American Locomotive Company's Richmond plant. All 20 went to the Erie Railroad, who also ordered 11 copies from Baldwin, which were delivered between 1923 and 1926. Lima Locomotive Works also built six locomotives based on the USRA heavy 4-6-2 for the Chicago and Eastern Illinois Railroad, who classified then as their K3 class. None of the originals built under USRA auspices or any of the subsequent copies were preserved.
References
Drury, George H. (1993), Guide to North American Steam Locomotives, Waukesha, Wisconsin: Kalmbach Publishing Company, ISBN0-89024-206-2, LCCN93041472
Huddleston, Eugene L. (2002). Uncle Sam's Locomotives: The USRA and the Nation's Railroads. Bloomington, Indiana: Indiana University Press. ISBN0-253-34086-1.
Westcott, Linn H. (1960). Model Railroader Cyclopedia, Volume 1: Steam Locomotives. Milwaukee, Wisconsin: Kalmbach Publishing Co. ISBN0-89024-001-9.