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Aerial view of a thermal establishment on the edge of a lake, with a building shaped like a ship. The reverse indicates the publisher 'Institut de Thalassothérapie Louisson Bobet', the architect M. Pierre Diener, and a list of treatments offered. French postage stamp from 1965, postmark from Sarzeau, addressed to Mlle Chevalier Corinne and M. Hace Fred in Massy.