After seeing the Do 17 M V1 at the Zürich air races in 1937, the Yugoslavian Air Force bought licence rights for production at the DFA factory in 1938. They equipped it with the more powerful Gnome-Rhône 14N radial engines and added a Hispano 20 mm cannon and three 7.92 mm Browning machine guns. Three variants were built in Yugoslavia. The first being the Do 17Kb-1 bomber aircraft and the second was the Do 17Ka-2 reconnaissance aircraft. The final variant was the Do 17Ka-3 reconnaissance aircraft.
1. Do-17 Ka-1, 209 eskadrila, Skoplje, June 1940
2. Do-17 Ka-2, 1. Önálló távolfeldelritö ostzály, Ferihegy
3. Do-17 Ka-1, Mostarska eskadrila, Rajlovac, May 1945
4. Do-17 Ka, 5th Bomber Regiment, Bulgarian AF, 1941-42