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The two locomotives in the class, CA78 and CA79, had been built in 1907 and 1905, respectively, by Baldwin Locomotive Works, Philadelphia, USA, and had been part of NH's G-4a class. They arrived in Australia in August 1943 and were used on the Trans-Australian Railway. CA78 was withdrawn in 1945 and CA79 in 1950. Both were scrapped in 1956.
Fluck, Ronald E; Marshall, Barry; Wilson, John (1996). Locomotives and Railcars of the Commonwealth Railways. Welland, SA: Gresley Publishing. ISBN1876216018.