The original, historic model was created in 1937 for Charlotte Perriand's workshop in Montparnasse. The base consisted of three circular legs joined by crosspieces which supported the tabletop. This, as the name implied, was interchangeable. A project designed to be used in various ways; in fact, the model would be used in many of Perriand's other subsequent projects, from the Japanese-inspired projects of the 1940s, with tops or woven trays made with local materials, to the living rooms of the Unité d'Habitation flats in Marseille. The Table à Plateau Interchangeable, today part of the Cassina I Maestri Collection, has also been developed for outdoor use. The outdoor version, in two sizes like the indoor model, has a solid teak structure and top in Carrara marble with oil-water finish.