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Black and white photograph of a S.N.C.F. steam locomotive of type 231 K, displayed at a station. The reverse details its technical characteristics: conversion from 1934 to 1949, 4 cylinders, superheating, 16 hpz, 4.3 m² grate, 96,500 kg in service, and mentions the photo by J. Rénaud for the « Life of Rail » edition of 1957.