Seven Class K tank locomotives which had been built for the Manila Railway Company in the Philippine Islands by the North British Locomotive Company (NBL) in 1914, were sold to the SAR in 1917 since delivering them to the Philippines during the First World War became impossible. They were superheated, had Walschaerts valve gear and were the first locomotives in South Africa to be equipped with exhaust steam injectors, which were of the Davies and Metcalfe pattern. Nicknamed "Manila", they remained in service until 1938.