 The prototype was built at the expense of the constructor and the first test flight was conducted at Zemun in the Autumn of 1931.After certification the aircraft was purchased by the Yugoslav Royal Air Force and the Yugoslav Aeroclub at Belgrade.The SIM-VIII was a parasol winged monoplane powered by an Siemens-Halske Sh 14 engine driving a wooden 2-bladed propeller, seating two crew members in tandem open cockpits.