Dornier Spatz

The Dornier 'Spatz' was a high-wing aircraft designed in the 1920s as a training and sport aircraft, but only one example was built.It differed from the Libelle II seaplane only in its external shape  Since spray protection was no longer necessary, the hull bow could be shortened. Instead of split fins, the aircraft was equipped with a rigid landing gear with a split axle and internal rubber suspension. source wikipedia