The South African Railways Class 10D 4-6-2 of 1910 is a steam locomotive from the pre-Union era in the Transvaal.In 1910 the Central South African Railways placed one American-built Class 10 4-6-2 Pacific type steam locomotive in service. When the South African Railways was established in 1912, this locomotive was renumbered and reclassified to the sole Class 10D.