Avia S-199

The Avia S-199 was a propeller-driven fighter aircraft built after World War II by the Avia Company (Avia, akciová společnost pro průmysl letecký Škoda), a branch of the enormous Škoda Works in Czechoslovakia. It was constructed with parts and plans left over from Luftwaffe aircraft production that had taken place under the country's German occupation during the war. Despite the aircraft's numerous problems and unpopularity with its pilots, it achieved fame as the first fighter obtained by the Israeli Air Force, for use during the 1948 Arab-Israeli War. Czechoslovak pilots nicknamed it Mezek ("Mule"), while in Israel it was officially known as the Sakeen ("knife" in Hebrew).

In practice, the aircraft was more often called Messerschmitt or Messer (which also means "knife", in German and Yiddish).