rear. This enabled the water capacity to be increased to on these 116 tenders. While the locomotive-and-tender's length over couplers was not affected, the total wheelbase of the second batch was longer since the distance between the engine's trailing wheel and the first tender wheel was increased from to . Four vacuum cylinders operated clasp brakes on all tender wheels and a hand brake was included. Since experience showed that a firegrate of cannot be served effectively under all conditions by manual stoking, particularly on long runs, a type H.T-1 mechanical stoker was fitted, supplied by the Standard Stoker Company of America. The mechanical stoker engine was mounted on the tender. Streamlining During the 1930s, the streamlining of locomotives was fashionable in Europe and the United States of America. It was proposed to adopt streamlining on some of the Class 23 locomotives which were intended for the Cape mainline and the manufacturers were requested to submit estimates to that effect. Since streamlining would increase the cost by £500 per locomotive and increase the weight by approximately , the idea was abandoned, especially in light of the negligible performance benefit of streamlining at the official maximum goods train speeds on Cape gauge and the reduced accessibility of working parts on a streamlined locomotive. Locomotive naming Although the naming of locomotives in South Africa dates back to the Cape Town Railway and Dock Company's 0-4-2 locomotives of 20 March 1860 and the Natal Railway's 0-4-0WT Natal of 13 May 1860, it was rarely done. In 1945, the Minister of Transport at the time, the Honourable F.C. Sturrock MP, instructed that a number of Classes 15F and 23 engines should be named after various South African cities and towns and fitted with suitable nameplates in both official languages. The decorative plates were fitted to the sides of the smokebox or to the elephant ear smoke deflectors of engines which were so equipped. Thirteen Class 23 locomotives were named. No. 3273 - City of Cape Town No. 3277 - City of Pietermaritzburg No. 3278 - Newcastle No. 3279 - Worcester No. 3280 - Oudtshoorn No. 3289 - City of East London No. 3303 - City of Grahamstown No. 3311 - City of Kimberley No. 3312 - Upington No. 3313 - City of Port Elizabeth No. 3314 - Uitenhage No. 3315 - City of Durban No. 3316 - Ladysmith In later years, some of these