Office chair 1970 Overman Svante Schoblom Sweden

1970 Overman Svante Schoblom office chair in Sweden. Black plastic shell clipped onto a light grey lacquered 5-point star base. There are scratches on the seat. On 5 casters. The seat turns. Rare piece. Designer and sturdy chair. Much copied but never equalled! Seat height: 45 cm (adjustable).