The South African Railways Class 17 4-8-0TT of 1926 was a steam locomotive from the pre-Union era in the Natal Colony.

One hundred of these locomotives were delivered in ten batches by Dübs between 1888 and 1899 and in 1915 another two were built from spare parts by the South African Railways (SAR) in their Durban shops.

[1][5] When a shortage of suitable shunting locomotives developed in the 1920s as a result of increasing traffic throughout the country and particularly on the Witwaters­rand, the SAR modified twenty-one of the Class A Belpaire 4-8-2 Mountain type tank loco­mo­tives.

They were employed as shunting engines around Durban, Pietermaritzburg and Port Elizabeth and gave more than thirty years service in this format.

[3][4][7][8] In November 1953 two of these locomotives, numbers 1423 and 1431, were purchased by the Zambezi Saw Mills Company for use on their Livingstone-Mulobezi logging railway in Northern Rhodesia.