This vintage office chair was designed by Jørgen Kastholm (model JK 9351) in 1973 for Kill International. It features a solid steel frame and is upholstered with black leather. The chair weighs around 30kg. It is set on wheels but does not swivel and is not adjustable in height. Labeled by Maker,This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution