An old and original Diamond Chair, designed by Harry Bertoia. U.S.A., Knoll International, 1960s The Bertoia Diamond Armchair, originally designed in 1952 is one of the most iconic designs by Harry Bertoia, who was not only a furniture designer but also a sculptor. Early production Diamond chair in white and black painted metal. The frame is repainted and screws have been replaced. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution