Ergonomic "Do More Chair" by Tan Sad for Ahrend, England, 1920s

This beautiful ergonomic "do more chair" was designed by tan sad in england in about 1920. The luxurious "do more chair" was far ahead of its time. In the netherlands, this chair was marketed by ahrend. It can swivel and both the back and seat are adjustable. The chair also has wheels. The chair is in very good condition for its age. With appropriate patina. The dimensions are: 80 cm height - 41 cm wide - 40 cm depth 43 - 59 cm seat height.