The original KZ-I made its first flight 24-Feb-1937 with a 38 hp ABC Scorpion engine. One was built but it disappeared in WWII. In Dec-1972 Gunnar Fjord Christensen began building a replica, with a 50 hp Volkswagen 1500cc engine, but when almost complete he sold it in 1977 due to illness to the Dansk Veteranflysamling who finished the work. In Jan-1974 it was allotted OY-CMZ but this was not taken up. It became OY-8604, later changed to OY-8605. The first flight was made 20-Nov-1988 and it was registered in Dec-1988. It is displayed in the Danmarks Flymuseum.