Between 1937 and 1968, the South African Railways placed 34 Class NG G16 Garratt articulated steam locomotives with a 2-6-2+2-6-2 Double Prairie type wheel arrangement in service on the Avontuur Railway and on the Natal narrow gauge lines. Three now work on the WHR.
Thanks to Paul Hobbs for his mesh library elements, some of which have been used in the model.