Bücker Bü 131 Jungmann

The Bücker Bü 131 Jungmann was a single-engine, two-seater basic training biplane produced in the 1930s. The wings were moderately swept, with positive dihedral and the lower wing slightly offset towards the rear. 3,000 were produced in Germany, for a total of about 5,000 aircraft (including those produced under licence).Source: Wikipedia