Charles Pollcok model 657 leather and steel framed sling chair designed for Knoll circa the 1970s. Original leather sling and cushion shows numerous marks and stress areas from regular use. Vinyl coated arm wrests also have moderate wear to surface. Steel frame looks to have been recently polished but heavy pitting to the original surface remains over most of the surface (see pictures for details). Original makers mark present on underside of cushion. Overall sturdy and ready for use with moderate to heavy wear throughout.