The South African Railways Class 3A 4-8-2 of 1910 is a steam locomotive from the pre-Union era in the Natal Colony.Early in 1910 the Natal Government Railways commissioned a single Class B 4-8-2 Mountain type locomotive, also known as the America D. In 1912, when it was assimilated into the South African Railways, it was renumbered and classified as Class 3A.