An iconic original Knoll Diamond Chair designed by legendary modernist Harry Bertoia, featuring its original olive green leather upholstered pad and black wire steel frame. A true mid-century modern design classic, this sculptural lounge chair seamlessly blends industrial form with organic comfort. Originally introduced in the 1950s, the Diamond Chair remains one of the most celebrated silhouettes in modern furniture history and is included in museum collections worldwide. This example retains its original Knoll tags and upholstery markings, adding strong collector appeal and authenticity. The olive leather upholstery has developed a beautifully aged vintage patina that complements the matte black wire frame exceptionally well. The geometric welded steel construction creates a striking airy profile while remaining surprisingly comfortable and supportive. An exceptional statement piece for modern, MCM, minimalist, industrial, or designer interiors. Details: • Authentic Knoll production • Designed by Harry Bertoia • Original olive leather upholstered cover • Original Knoll labels and markings present • Black welded steel wire frame • Classic Diamond Chair form • Made in USA Dimensions: • Height: 30.25 in (76.84 cm) • Width: 34 in (86.36 cm) • Depth: 28 in (71.12 cm) • Seat Height: 16 in (40.64 cm) Condition: Good vintage condition with age-appropriate wear consistent with use and age. Original leather upholstery shows visible wear, patina, and small seam separations as photographed, which contribute to the chair’s authentic vintage character. Wire frame remains structurally sound and presents beautifully overall. Why This Piece Matters: The Bertoia Diamond Chair is considered one of the most important achievements in mid-century modern furniture design. Authentic vintage Knoll examples with original upholstery and labels are increasingly difficult to find and highly sought after by collectors, designers, and architects. Harry Bertoia, Knoll, Diamond Chair, Mid Century Modern, MCM, Wire Chair, Sculptural Seating, Modernist Design, Eames Era, Bauhaus, Designer Furniture, Vintage Knoll, Industrial Modern, Atomic Age, Modern Lounge Chair