South African Railway NGG16 are classes of Garratts built between 1937-1968.
I really like these steam locomotives, I originally was going to use an NGG16 for Roger(my original character).
They the last steam locomotives built for South African Railways and last 2 foot gauge(610mm)steam locomotives to operate freight in South Africa(look up Alfred County Railway on YouTube).
Most of them survived, with a couple of them operating in Wales, Australia, and their home country South Africa.
The reason why I chose the Avonside 0-4-0t then the Garratt, is because I like small locomotives and they’re easier to draw. The NGG16 Garratt would take me all day to draw.