Reduced to the essentials: the classic tubular steel chair S 411 The outstanding features of this chair are elegance, timelessness and exceptional seating comfort. In addition, it is lighter than a cantilever chair. While the first tubular steel armchairs from the 1920s were rarely upholstered, the Thonet catalogue of 1935 presented a whole range of armchairs and sofas with voluminous upholstery. Thonet's model S 411, developed in-house in 1932, probably marked the beginning of this new product series. Today it is produced with high-quality upholstery.