Bidspirit auction | Vintage nickel laboratory chair-stool

Vintage nickel laboratory chair-stool - Vintage laboratory chair-stool, mid-20th century approximately, made of nickel-plated metal, with a mechanism for up-down adjustment (currently it seems that the chair is fixed and the mechanism does not work?), height: 51 cm, Chair seat diameter: 31 cm. Light wear, some corrosion, slight curvature to the seat frame.