The Diamond Chair is part of Bertoia’s 1952 wire collection for Knoll International. The shell is formed from bent and welded steel rods, creating a geometric grid that provides structure and flexibility. The open construction gives the chair a light visual presence while maintaining strength. The angled base supports the curved shell and allows for a relaxed seating position. The seat pad in yellow fabric adds comfort without altering the clarity of the original design. The chair remains in its original vintage condition. The frame shows wear consistent with its age and regular use. As shown in the photos, the upholstery displays some fading and a few stains. 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