Swiss adjustable swivel desk office chair by Stoll Giroflex, around 1965 High quality ergonomic office desk chair with a lot of features -Easy height-adjustment from approx. 46 to 58 cm seatheight -360 degree swivel -spring swivel (when you sit down and stand up the chair moves up and down with you) -The backrest moves automaticly with the movement of your back -Backrest is adjustable forwards/backward -Swivel castor wheels It's a high quality chair for your home office with a great vintage appearance made by Stoll Giroflex Zwitserland. Dating: 1960s/1970s Plywood seat and backrest covered with soft black leather and green-colored soft leather seat and backrest cushions which can be taken off Seat height adjustable from approx. 46 to 58 cm using a lever under the seat. The backrest is also adjustable forwards/backwards using another lever. Condition: very good, all works perfect. The green leather cushions has a few marks and patina due to usage, see pictures (no tears or splits in the leather) Dimensions: height 67-95cm, width 54cm (seat), Ø 55cm base, seat height 46-58cm Stoll invented in 1962 the spring swivel, the first swivel chair with suspension, and applied for a worldwide patent. The brand name “Giroflex” (spin and yield), introduced in 1948, is linked to this invention. from 1962 onwards, collaboration with internationally recognized occupational physiologists got underway. This resulted in ergonomically designed chairs aimed at the needs of people who sit for long periods This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution