The South African Railways Class NG3 4-6-2T of 1907 is a narrow gauge steam locomotive from the pre-Union era in the Natal Colony.In 1907 the Natal Government Railways placed six 4-6-2 Pacific type narrow gauge tank steam locomotives in service. In 1912, when these locomotives were assimilated into the South African Railways, they retained their engine numbers, but with an "NG" prefix added.