Eberhard Krauss designed Thonet chair no. A 821 F around 1930 for the Thonet Werkbund Exhibition Contest in Vienna. The chair is depicted in the Thonet Mundus catalogue of 1934 (page 21). It features a beech bentwood frame and a handwoven rattan seat and backrest. Thonet stamp and remainder of paper Thonet label underneath the seat. 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