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Black and white photo of steam locomotive 2901 in full action, with men posing beside it. The back details its technical specifications: 4 cylinders, 16 hpz engine, 4 m² grate, coupled wheels 1.95 m, weight 91,000 kg, and notes that it is an unpublished photo taken during its trials in 1908. The publisher is « La Vie du Rail », no. 184, edition 1957.