Set of 6 Friso Kramer chairs for Ahrend by Cirkel Result 60s 70s

Set of 6 Kramer Friso chairs for Ahrend de Cirkel Result Netherlands 60s 70s Designer: Kramer Friso, original gray curved metal base, walnut plywood seat and back, on some chairs the color of the base is more oxidized in some places and on other chairs less, the veneer of some chairs has traces of surface scratches and on others less visible, overall the 6 chairs are in good condition consistent with age and use seat height 46 cm