Highest height: 51 cm (20.1 in) Lowest height: 42 cm (16.5 in) Seat diameter: 42 cm (16.5 in) This piano stool is an elegant and functional accessory from the Czechoslovak Art Deco period of the 1930s. It was manufactured at the world-famous Thonet plant in Bystřice pod Hostýnem, which served as a hub for innovation in bentwood furniture during the interwar period. The stool combines a restrained modern aesthetic with the precise technical solutions characteristic of the Thonet brand. The item has undergone professional restoration, during which the original polish was sensitively refreshed. The frame is crafted from solid beech, while the circular seat is made of beech plywood. A key feature is the original steel mechanism, allowing for smooth height adjustment by simply rotating the seat around its axis. The mechanism is fully functional, stable, and ready for daily use. It has been re-polished with polyutherane piano lacquer by our professional refurbishing team in Czechia according to the original process. Our professional refurbishing team in Czechia has fully restored it according to the original process. This item features classic Art Deco elements. Art Deco is a style that originated in France in the early 20th century. Its furniture designs are meticulously crafted, usually using exotic woods. Pieces are typically lacquered to give off a dazzling gloss. These eloquently crafted pieces will add visual performance and posh to any interior. 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