Thonet piano stool, early 20th century

Antique piano stool/swivel stool by thonet. The piano stool has four steam-bent feet with a bentwood ring for stability. The stool can be adjusted in height from 42 cm to approx. 60cm. The spindle runs fine. The seat is made of bent plywood, the other parts are made of solid beech wood or metal. The stool has the original thonet paper label.