A truly remarkable standard gauge build of 1910 was a class of four handsome 4-2-2 express passenger locomotives to the design of E. J. Dunstan for the Shanghai Nanking Railway. The order was received on 19 April 1910 and the novel design required the production of totally new drawings and patterns for all parts. Even so, the first engine was steamed just seven weeks later on 8 June 1910. In service these engines, probably the last, and the biggest, single driver engines ever built, proved to be fast (60 mph), smooth running, and very economical on fuel when compared with similar 4-4-0 engines on the same line.