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Postcard showing a steam locomotive of type 4700 PO, converted in 1940-41, with an ACFI heater and valve gear. The reverse details its technical characteristics: HP cylinders 440×650 mm, LP cylinders 650×690 mm, in-service weight 112.800 kg, and mentions the publisher H. M., 8, rue de Tournon, Paris. Postmark and cancellation not visible.