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Postcard showing a compound steam locomotive type 240 P 4, equipped with a Houlet superheater and intended for heavy express trains. The reverse details its technical specifications: ACFI cylinders, grate area 3.72 m², in-service weight 108,820 kg, and notes that it comes from the conversion of Pacific PO series 231.500 machines in 1939–1941. The publisher is H. M. P., Rue de Tournon, Paris.