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Postcard showing the interior of the caves in La Balme-les-Grottes, with two caravans navigating a subterranean lake and visitors in period attire. On the reverse, handwritten address to Madame Madeleine Dagalier in Samoëns, Haute-Savoie, with a 10-centime green stamp and a postmark from La Balme-les-Grottes.