Launched in 1972, DS-600 is an indestructible, variable modular system of upholstered furniture consisting of individual, addable armchair elements. These consist of an L-shaped hard foam core covered with a down-lined and leather-covered cushion. The elements are connected with a plug-in hinge and a construction made of hide and zipper. The stool element complements the famous snake-shaped seat with an intermediate and end element. The longest DS-600 currently stands in the palace of the ruling family of a sultanate, where legendary 406 upholstery elements in rainbow colors join up to create a circular or serpentine endless sofa. The affectionately named “Tatzelwurm” sculpture also took up residency in the living rooms of Tina Turner, Jerry Hall and Mick Jagger and became the “star” of numerous Bond films, New York’s legendary “Studio 54” also adorned itself with the trendy sofa designed by a Swiss designer collective in the early 1970s. The idea of a convex and concave curved sofa was brilliant, but transforming it into a producible item of seating furniture proved more difficult than anticipated. Together with the De Sede development team, the designer collective spent a year building countless prototypes, almost all of them were criticized and rejected. But the designers showed nerves of steel, and DS-600 gradually became what it is today: an indestructible, variable modular system of upholstered furniture consisting of individual, addable armchair elements.