It's a Slaby Beringer design (note the Slaby Beringer logo on the wheel hubs) from 1923/1928. The car was wooden, and powered by an air cooled DKW motorcycle engine. It is possible that the car was marketed as the first DKW, as J.S. Rasmussen, who owned DKW, had a controlling interest in Slaby Beringer, and took over the Slaby Beringer company when it went into bankruptcy in 1924. This car was similar to the DKW powered Slaby Beringer single seater of 1923 (see the solved puzzle Wendax 777).