This Diamond Chair by Harry Bertoia for Knoll is an iconic 1950s furniture design that combines timeless elegance and sculptural form with comfort and functionality. This version features a black wire frame finish and warm brown upholstery, creating a stylish and modern look. The upholstery is in perfect condition; the chair itself has some signs of wear. This chair is marked 1976. 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