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View of the medieval keep of Montlhéry, a cylindrical stone tower with a 132-step staircase, accessible via a wooden path and metal railings. The printed text indicates an altitude of 23 meters. On the reverse, handwritten correspondence addressed to Mr. Barbason in Vichy, with a 10-centime postage stamp and a postmark from Montlhéry dated August 16, 1938.