This cantilever was designed in 1926 and put into production in 1927. It is similar in form to a chair attributed to Breuer by Thonet in their production of 1927 (B33). In a law suit of 1926 to 1932, the German courts attributed the models to Stam. In the earliest Stam production version there was a horizontal bar between the front legs. In the Breuer version, as well as all later version, the horizontal bar was replaced by a support under the seat.