Diamond Chair Model 422 (large version) by Harry Bertoia (1915-1978) for Knoll International. Execution, black, black, black plastic -coated/ rilsan coating, full cover. Production of the 1970s. Provision: Hessicher architectural household. Dimensions Height 68cm Width 114cm Depth 82cm Literature proof: Knoll au Louvre, Catalog of the Exibition Held at Pavillon de Marsan, Musee des Arts Decoratifs 107, Rue de Rivoli, Paris, January 12, March 12, 1972 The Diamond Chair is in good condition. The Rilsan coating is completely intact, the first orig. Shock Mounts. Full reference shows old -age weaknesses in the upholstery/ foam. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution