▁extremely ▁large ▁and ▁were ▁the ▁wid est ▁locomot ives ▁to ▁see ▁service ▁on ▁any ▁of ▁the ▁ ▁narrow ▁gauge ▁lines ▁in ▁South ▁Africa . ▁ ▁South ▁African ▁Rail ways ▁When ▁the ▁Union ▁of ▁South ▁Africa ▁was ▁established ▁on ▁ 3 1 ▁May ▁ 1 9 1 0 , ▁the ▁three ▁Col onial ▁government ▁rail ways ▁( CG R , ▁Natal ▁Government ▁Rail ways ▁and ▁Central ▁South ▁African ▁Rail ways ) ▁were ▁un ited ▁under ▁a ▁single ▁administration ▁to ▁control ▁and ▁admin ister ▁the ▁rail ways , ▁ports ▁and ▁har b ours ▁of ▁the ▁Union . ▁Although ▁the ▁South ▁African ▁Rail ways ▁and ▁Har b ours ▁came ▁into ▁existence ▁in ▁ 1 9 1 0 , ▁the ▁actual ▁classification ▁and ▁ren umber ing ▁of ▁all ▁the ▁rolling ▁stock ▁of ▁the ▁three ▁constitu ent ▁rail ways ▁were ▁only ▁implemented ▁with ▁effect ▁from ▁ 1 ▁January ▁ 1 9 1 2 . ▁ ▁The ▁two ▁locomot ives ▁were ▁ren umber ed ▁to ▁N G 2 5 ▁and ▁N G 2 6 ▁on ▁the ▁South ▁African ▁Rail ways ▁( S AR ), ▁with ▁the ▁N G ▁prefix ▁ident ifying ▁them ▁as ▁narrow ▁gauge ▁locomot ives ▁in ▁the ▁S AR ▁registers . ▁They ▁remained ▁in ▁service ▁on ▁the ▁Av ont uur ▁branch ▁for ▁the ▁duration ▁of ▁their ▁service ▁lives , ▁until ▁they ▁were ▁with dra wn ▁in ▁ 1 9 2 9 ▁without ▁having ▁been ▁class ified ▁by ▁the ▁S AR . ▁ ▁References ▁▁ 0 4 5 0 ▁Category : 1 C 2 ▁locomot ives ▁Category :