The Zlin Z-381, the Czechoslovak-built Bücker Bestmann, went by the name Fecske (Swallow) in Hungarian miilitary and paramilitary service. Avia-info.hu suggests that six airframes, HA-BUA through HA-BUF, were delivered directly to Magyar Honvéd Sportszövetség, the Hungarian Defence Sports Association, in 1949. Others were later transferred from the Hungarian air force, such as HA-BUL / 208 (c/n 251, ex I-201) and HA-BUM / 209 (c/n 252, ex I-202). This formation was pictured over Hajdúszoboszló in eastern Hungary. Photo from: Fortepan