Two “Oreilles d’éléphant” planters, by Willy Guhl, Eternit AG
Switzerland, circa 1960

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Eternit France is a French industrial company that was the leading producer of asbestos cement, ahead of Saint-Gobain, until asbestos was banned in 1997, and has since been replaced by fiber cement. Eternit France is now owned by the Belgian Etex group, which took over from Eternit Belgium in 1995.
To find out more, please on the Wikipedia Link.