Baltimore & Ohio 2-8-2 No. 4500 of class Q-3 was the first locomotive to be built from one of the standard designs prepared by the United States Railroad Administration (USRA). In an image purchased from a eBay seller, it appears as displayed with patriotic ceremony when it rolled off the erecting floor of Baldwin Locomotive Works in 1919 after only twenty days in construction. Members of the Q-3 class had 64-inch drivers, a boiler pressure of 200 p.s.i., and cylinder dimensions of 26x30 inches. They weighed 292,000 pounds and developed 53,869 pounds of tractive effort. Evaporative heating surface totaled 3777 square feet, superheater surface 882 square feet, and grate area nearly 67 square feet. The last member of the Q-3 class was withdrawn from service in in 1959, but No. 4300 (renumbered to 300 in 1956-57), as an historic locomotive, survives at the Baltimore & Ohio Railroad Museum, its appearance altered including having the raised headlight in common with other B&O Mikados.