South Australian Railways R class

The South Australian Railways R class was a class of 4-6-0 steam locomotives operated by the South Australian Railways. The initial 30 of the class were upgraded and reclassified as the Rx class, and the 54 later acquisitions were built to Rx specifications. In 1886 Dübs and Company of Glasgow delivered the first six, and a further 24 were built by James Martin and Company of Gawler by November 1895. From 1899 all were rebuilt with Belpaire boilers, giving a 20 per cent increase in tractive effort. The further 54 were built by the Islington Railway Workshops, the North British Locomotive Company in Glasgow and Walkers Limited of Maryborough, Queensland. The remainder served into the mid-1960s.