This chair was designed in 1928 by the German architect Adolf Gustav Schneck (1883 - 1971), member of the "Deutsche Werkbund". The chair is depicted in the Thonet catalogue of 1928. It has a natural beech colour; others were also produced in bright modernist colours like orange and yellow. Marked Thonet with stamp and paper label. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution less