The South African Railways Class NG1 0-4-0T of 1900 was a narrow-gauge steam locomotive from the pre-Union era in Transvaal. In 1900, the British War Office placed two Sirdar class 0-4-0T narrow-gauge steam locomotives in service near Germiston. At the end of the Second Boer War, the locomotives were sold to a farmer who used them on a firewood line out of Pienaarsrivier, until the line and locomotives were taken over by the Central South African Railways.