The coupled wheels were in diameter. The heating surface of the boiler was , of which was superheating surface, while the grate area was . The total weight in working order was 60.5 tons, with a maximum axle load of 12.9 tons. Its maximum speed in ordinary service was . The three cylinders were provided with rotary cam poppet valves with the camshaft divided into two parts, independently driven from each side of the engine, which avoided complete immobilisation in case of a breakdown on a long stretch of single track. These locomotives were all later converted to burn oil fuel. During the Second World War, after the fall of Singapore, the Japanese Southern Army's Railway Engineering Troops transferred a number of older Malayan Pacific locomotives to operate their "Taimen Rensetsu Tetsudo", the Thailand-Burma Railway. Some Pacifics were not returned to Malaya after the war but remained in Thailand. When the rail connection was established between the Malayan and Thai railways, the Pacifics were a common sight at the head of the "Singapore" and "Bangkok expresses" as well as on the other passenger trains in domestic Malayan service. After the arrival of the mainline diesel-electric locomotives in the latter part of the 1950s, the Pacifics were transferred to less important trains. Many survived up the end of Malayan steam traction in the 1970s. The Canadian National Railway (CN) sold a gauge Pacific locomotive, the former CN no. 591, to "Ferrocarriles Nacionales de México", where it was numbered 139. (Also see )  The "Caminhos de Ferro de Lourenço Marques" in Portuguese Mozambique ordered its first three class 300 Pacific locomotives from Baldwin in 1919. They hauled passenger trains on the line between Lourenço Marques (Maputo) and Ressano Garcia, and also crossed the South African border at Komatipoort in South Africa, from Lourenço Marques, where South African Railways locomotives took over for the rest of the way to Pretoria. Two more locomotives were added in 1923 and a further order for four additional Pacific locomotives was placed with Henschel in 1955, for use on the Beira–Bulawayo railway line. Henschel also supplied three more modern Pacific type locomotives to Mozambique in 1955. These Henschel Pacifics weighed 73.75 tons in working order while its total weight, tender included, was 128 tons.