Upholstered in black leather. Good used condition. The seat has been repaired in two places with cracks. Otherwise, moderate signs of wear. Designed in 1929 by Ludwig Mies van der Rohe, based on a design by Sergius Ruegenberg, for the German Pavilion at the Barcelona International Exposition. The MR90 is now considered an icon of modern design. 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