Early edition Groovy chair F580 by Pierre Paulin for Artifort, Netherlands. The 1960's edition was leaner, taller and a little more curvy than the current modified edition. Re upholstered in off white Tonus by Kvadrat with their amazing wool weave and whose fabrics covered most of the early Paulin designs. New foam. Note, seat height and arm height vary due to slope. No makers marks but guarantee authenticity.