Bertoia diamond chair, model hb_10, based on a 1940s design by harry bertoia for knoll. Wire mesh frame with a new red felt cushion. quality features: excellent craftsmanship high-quality materials made in the usa. Design: harry bertoia, manufacturer: knoll good condition with slight signs of wear. 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