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Interior view of a cave with stalactites and stalagmites, labeled 'Grotte de Choranche (Isère) - Site classé *** - Siphon terminal'. The reverse indicates the publisher 'Société d'Agences et de Diffusion Bobillot', episode n°8, and a handwritten correspondence to Paris. 180F postage stamp and postmark from Hostun-Eymieux, 25 February 1986.