 These locomotives were designated Class 6H on the South African Railways in 1912.Type XD tenders were built in 1901 and 1902 by Neilson, Reid and Company.The original 6th Class locomotive and tender was designed in 1892 by H.M. Beatty, the Locomotive Superintendent of the Cape Government Railways (CGR) Western System at the time, at its Salt River works in Cape Town.