C high industrial architect swivel chair, industrial adjustable seat height and backrest

The ad is for chair c, 5 other almost identical chairs are available for sale, variations in the height of the chairs the foot pads will all be replaced for the sale chair with its original paint, traces of use, perfectly functional height-adjustable seat and backrest adjustable both in height and inclination minimum seat height 40cm maximum seat height 59cm minimum height 67cm maximum height 95cm seat width 36cm seat depth 36cm back width 37cm base diameter 57cm weight 10kg.