Swiss Stoll rotating office chair from the 60s

Rotating office chair from the 1960s, with the so-called "federdreh" system - probably from stoll (switzerland), adjustable in seat height (from 46 to 56 cm from the ground). The height of the backrest, its inclination and its tension are also adjustable. Solid beech for the curved backrest and saddle-shaped seat. Very good condition, patina of use. Four small screw threads, originally used to attach a felt pad (not aesthetically pleasing), have been filled in on the seat. Perfectly functional adjustment mechanisms. Robust and stable quadripod base.|seat 40 X 41 cm, overall height at the lowest 82 cm, at the highest 92 cm, wheelbase 345 X 35 cm.|delivery throughout france (other countries on request), professional invoice.