This chair was one of two prototypes created by Knoll under the supervision of Joe D’urso, circa 2007. During the creation of the now world-famous D’Urso swivel chair. The other chair was reportedly destroyed making this a one-of-a-kind prototype. This design was never produced as Knoll deemed it too expensive to create. The chair was hand built and upholstered in Red Knoll leather and wool with down filled cushions. The polished aluminium base is very sturdy and it swivels as intended. The chair is in like new condition.