The primary steam locomotives in the film are Class 230Bs, #739 (leads the military train Paris to Vaires), 517 (art train until Rive-Reine crash), 855 (rear engine in Rive-Reine crash), and 711 (art train post-crash). These engines were built from 1901 to 1912, and were nearing the end of their long service life in 1964.
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