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Black-and-white photograph of a S.N.C.F. steam locomotive of type 231.C.50 in service in the Nord region. The reverse details its technical specifications: 4 cylinders, superheating, 17 hpz, 3.5 m² grate, coupled wheels 1.91 m, weight 100,500 kg, put into service 1930-1931. The publisher is J. Renaud, with number 172. A stamp is affixed and the postmark is visible.