The South African Railways Class C1 4-6-2T of 1901 was a steam locomotive from the pre-Union era in the Natal Colony.

In 1901, one of them was rebuilt to a 4-6-2T Pacific type locomotive and in 1912, when it was assimilated into the South African Railways, it was renumbered and designated Class C1.

25, to a 4-6-2 Pacific type wheel arrangement for suburban passenger working on the South Coast line.

A larger coal bunker increased its fuel carrying capacity from 1 long ton (1.0 tonne) to 2 long tons 5 hundredweight (2.3 tonnes), while larger water tanks increased its capacity from 700 to 1,070 imperial gallons (3,180 to 4,860 litres).

It was also equipped with a larger boiler, with the operating pressure increased from 140 to 160 pounds per square inch (965 to 1,103 kilopascals).