The Bertoia Large Diamond Chair from Knoll is a tribute to form and function. Crafted from welded steel rods in various finishes including chrome gold and Rilsan this iconic chair boasts durability and style. Knoll is the manufacturer and copyright holder of all Bertoia chairs. Chairs based on steel grid wire forms were designed by Harry Bertoia between 1950 and 1951 and further developed for production by Harry and the development team consisting of Richard Schultz Don Pettit and Bob Savage in 1951 1952.