Achtung, East Europe!
ANBO I, the first completed project of the Lithuanian inter-war engineer, brigadier general (at the time, senior lieutenant) Antanas Gustaitis. After being put in charge of a trainer squadron, he started saving up money for his own plane (probably after seeing various foreign designs and studying the successes and failures of the designs of another Lithuanian, Jurgis Dobkevičius). After getting the green light from the Minister of Aviation, it was built in the winter of 1924. Gustaitis himself tested out the plane, and found out that the plane was stable and easy to control. Afterwards it served in the Lithuanian Air Force effectively until 1930, being displayed in the War Museum of Vytautas the Great since 1935 (it was taken apart and crammed into a warehouse during the Soviet occupation, until being taken out again in 1970). It is the only surviving Lithuanian-built inter-war airplane.
As time went on, it became apparent that the Albatros B.II airplanes were getting severely obsolete (being built in 1913) and that importing them would be much more expensive than producing them domestically (the only Lithuanian plane still in flying condition was the ANBO I, with all three designs of Dobkevičius crashing, and eventually killing the engineer himself). After a short tenure in an avionics and engineering school in Paris, Gustaitis started work on his second project - a light, parasol wing training aircraft in 1927. While having 100 HP less, the ANBO II managed to outspeed the old Albatros.
Between 1928 and 1930, the plane trained military pilots, until in 1931, after extensive repairs, it was gifted to the Aviation Club of Lithuania (Lietuvos Aero Klubas), and was used to train civil pilots. LAK used the plane for almost four summers, until in 1934, after testing acrobatic manoeuvres, the plane broke in half and crashed, killing the pilot.
hope you dont mind these completely useless history lessons