Pair of Vintage Eero Saarinen Knoll Tulip Armchairs

For sale a set of 2 tulip swivel chairs, signed knoll, eero saarinen, usa, circa 1960. Specific original model: orange back covering. In very good condition, the seats are impeccable. A small mark on the back of the foot of the left chair. Very comfortable, very little used. Rare.