Knoll is an American company that manufactures office systems, seating, storage systems, tables, desks, textiles and accessories for the home, office and higher education. The company is the licensed manufacturer of furniture from an endless list of excellent furniture designers. The Diamond Chair by Harry Bertoia is one of the most significant designs produced by Knoll. This sofa is an extravagant highlight with its mirrored sides.The sofa is in very good condition. However, vintage items like this may show some slight signs of use such as unobtrusive scratches and other signs of time. These can be seen in the pictures.