MTH RAILKING DRG 2-8-8-2 IMPERIAL USRA MALLET STEAM ENGINE O GAUGE 30-1897-1 NEW
(For more on the USRA, see page xx.). USRA designers turned the Y-2, which had been a disappointing design for the N&W, into a highly successful freight engine. In 1952, a Norfolk and Western Y6b, a direct descendant of the original USRA design, was the last mainline steam engine built in the United States.