The requirement for a tank locomotive which could haul at least one-and-a-half times as much as a Dübs A locomotive on the Natal Government Railways mainline, resulted in the design of a tank locomotive by G.W. Reid, the Locomotive Superintendent of the NGR at the end of the 19th century. On the NGR, the locomotive type became known as the Reid Tenwheeler, later designated the NGR Class C.
Manufacturers
In 1902, during the Second Boer War, the Imperial Military Railways of the invading British forces experienced a shortage of locomotives as a result of damage caused during hostilities and the transportation demands which were placed on the Railways by the British Military. Lieutenant-Colonel E.P.C. Girouard KCMGDSO of the Royal Engineers, the Commissioner of Railways for the Transvaal and Orange River Colony, therefore placed urgent orders for 35 locomotives of the NGR's Reid Tenwheeler type. To ensure rapid delivery, the order was split between Dübs and Company, who built engine numbers 220 to 234, and Neilson, Reid and Company, who built numbers 235 to 254.
Service
Imperial Military Railways
Compared to the NGR versions, the IMR locomotives were more ornate. In true military tradition, the steam domes, chimney caps and boiler bands were of polished brass. A weatherboard was affixed to the coal bunker to offer better protection to the crew when travelling bunker forward. The practice of polished brasswork was followed on all new IMR locomotives and was continued even after the war, when the IMR became the Central South African Railways.
Central South African Railways
At the end of the war, these Reid Tenwheeler locomotives were designated Class E on the CSAR roster. Six of the Class E locomotives, CSAR numbers 222, 233-235, 245 and 252, were converted to Mountain type locomotives c. 1903 by removing the fifth pair of coupled wheels and blanking off the resulting opening in the frame. The same modification was also done by the NGR on some of its own Reid Tenwheelers to make them more suitable for yard work.
South African Railways
When the Union of South Africa was established on 31 May 1910, the three Colonial government railways were united under a single administration to control and administer the railways, ports and harbours of the Union. Although the South African Railways and Harbours came into existence in 1910, the actual classification and renumbering of all the rolling stock of the three constituent railways were only implemented with effect from 1 January 1912. In SAR service, the five survivors of these CSAR tank locomotives were designated Class H1. The locomotives were used extensively for shunting work in several parts of the country. The Class H1 had a long service life and the last of the Class was only withdrawn from service in 1966.
Works numbers
The builders, works numbers, rebuilding and renumbering of all 35 original locomotives are listed in the table.
