Friso Kramer industrial drawing chair for Ahrend de Cirkel ca 1960

Rare work chair / adjustable drawing chair (drawing table chair) designed by friso kramer for ahrend de cirkel in the 1960s. See the photos for more details! The height is adjustable with a rotating button up to 80 cm. The back seat can be set separately with another rotating button. The chair is equipped with the original ring/foot support. The frame is made of iron and the seat/back is made of birch wood. This drawing chair has been widely used, the chair is in a vintage state with signs of wear adapted to its age.