In 1924, the Sudan Government Railways received ten Mikados from Robert Stephenson & Co. and numbered them 180 to 189. They were designed by C.G. Hodgson and compared to the Mikados delivered by North British in 1921, they were lighter and had a smaller boiler. They had outside Walschaerts valve gear, a superheater and a Weir feed water pump. While the third driving axle had no wheel flanges, the flanges on the second driving axle had been made thinner. These locomotives were used on the Kassala Line that was also opened in 1924 and connected Kassala with Port Sudan. With a length of 216 miles and 63 bridges, the Kassala Cotton Co. contributed a large part of the construction costs.