Lounge chair, black stained frame and lacquered seat and back. Produced by Cassina, “I Maestri” Collection. When Cassina set its targets on getting some of Rietveld’s work in their historical catalog, the Rietveld family lent its support and, in 1972, Cassina was granted exclusive worldwide rights to produce and market furniture and other objects designed by G. T. Rietveld.