lines and X class heavy goods locomotives both featured wide fireboxes positioned behind the coupled wheels and above the frames. The South Australian Railways (SAR) employed four distinct classes of 2-8-2 locomotive, the locally designed 700 and 710 class, the 740 class that was originally built for China by Clyde Engineering and purchased by the SAR after the order was cancelled in the wake of the Chinese Communist Revolution, and the 750 class, a group of ten surplus VR N class locomotives. To assist with the postwar rebuilding of Australian railways, American-designed Mikado locomotives were also introduced after the Second World War, such as the Baldwin-built New South Wales Government Railways (NSWGR) D59 class and the Queensland Rail (QR) AC16 class. A Mikado was also the last new class of mainline steam locomotive to be introduced in Australia, the V class heavy freight locomotive of the Western Australian Government Railways (WAGR) of 1955. Austria The 4-cylinder compound class 470, developed in 1914 by Karl Gölsdorf, was built for express trains on mountain lines. From 1927, some of these locomotives were rebuilt to two-cylinder superheated steam locomotives and designated class 670. They were reclassified to class 39 from 1938 and remained in service until 1957. Belgian Congo In 1917, 24 Mikado type steam locomotives were built for the Compagnie du chemin de fer du bas-Congo au Katanga (BCK), a new line from the Northern Rhodesian border to Port Francqui in the Belgian Congo. Since the line was just being completed at the time, the full complement of locomotives were not required immediately and four, possibly six, of them were temporarily leased to the South African Railways to alleviate a wartime shortage of locomotives. In South Africa, they were known as the Katanga Mikado. Six more of these engines were leased to the Beira and Mashonaland and Rhodesia Railways (BMR), which operated between Umtali in Southern Rhodesia and Beira in Mozambique. The locomotives were all forwarded to the Belgian Congo after the war, where they were numbered in the BCK range from 201 to 224.<ref name="SAR&H Sep 1945">Espitalier, T.J.; Day, W.A.J. (1945). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued).South African Railways & Harbours Magazine September 1945. p. 673.</ref> Canada Canadian National (CN) operated a few Mikado locomotives: One locomotive in the R-1 class, number 3000. Thirty locomotives in the R-2