system of grouping narrow-gauge locomotives into classes was only adopted at some time between 1928 and 1930 and, at that point, the two Sirdar locomotives were classified as Class NG1. When the Settlers branchline was converted to Cape gauge in 1923, the locomotives were transferred to work on the line which was under construction between Elandshoek and Mount Carmel. When this line was closed in 1931, the Class NG1 locomotives were withdrawn from service. References 2540 0-4-0T locomotives B locomotives Kerr Stuart locomotives 600 mm gauge railway locomotives Railway locomotives introduced in 1900 1900 in South Africa Scrapped locomotives