"The S 840: Design-perfect sitting comfort conference and living areas High-quality visitor's and conference chair with a special aesthetic appeal. Its unique characteristic is the accentuated separation of shell and frame. The moulded plywood seat shell has formal analogies to automobile design in the shape of the surfaces - translated to wood as a material at Thonet. The ergonomic shape with special upholstery offers high seating comfort. The use of diverse veneers and stains and various upholstery covers in leather or fabric change the character of the chair and allow it to fit in with any interior design environment. Various backrest heights and foot frames are available. Base frames with four-star or five-star swivel base with castors or gliders. Moulded plywood shell in stained beech, oak and walnut. Comfort cushion covered with leather or fabric. The five-star base chairs have a rocker mechanism, and the chairs without castors (S 845 DW and S 845 DWE) are additionally equipped with a return mechanism that automatically turns the seat back to its original position."

"The S 840: Design-perfect sitting comfort conference and living areas High-quality visitor's and conference chair with a special aesthetic appeal. Its unique characteristic is the accentuated separation of shell and frame. The moulded plywood seat shell has formal analogies to automobile design in the shape of the surfaces - translated to wood as a material at Thonet. The ergonomic shape with special upholstery offers high seating comfort. The use of diverse veneers and stains and various upholstery covers in leather or fabric change the character of the chair and allow it to fit in with any interior design environment. Various backrest heights and foot frames are available. Base frames with four-star or five-star swivel base with castors or gliders. Moulded plywood shell in stained beech, oak and walnut. Comfort cushion covered with leather or fabric. The five-star base chairs have a rocker mechanism, and the chairs without castors (S 845 DW and S 845 DWE) are additionally equipped with a return mechanism that automatically turns the seat back to its original position."

1819年，德国顶级家具制造商Thonet由著名木工大师Michael Thonet成立。Michael Thonet于1859年在维也纳取得了工业生产的突破，制作了第14号座椅，创新性地使用了弯曲坚实榉木技术，并首次在家具制造行业实施单个生产工序标准化以及劳动分工的理念。第14号座椅为Thonet成长为全球企业扫清了道路，随后诞生了无数成功的曲木设计。Thonet的生产在1912年达到巅峰：那一年，生产了两百万件产品，风靡全球。 

圆管钢家具是Thonet生产线的第二款恒久经典。在20世纪30年代，公司成为当时世界上该类创新家具的最大生产商。钢制圆管家具由众多著名设计师担纲设计，包括Mart Stam, Ludwig Mies van der Rohe和Marcel Breuer等。如今，那些早期的圆管钢家具的设计被视为设计史上的里程碑。

它们清晰、开放和简洁的造型表达了在日常文化和设计艺术中的新态度，因而在“新客观”流行趋势下声名显赫。