"50"^^ . . "The IMAM Ro.57 was an Italian twin-engined, single-seat monoplane fighter of the Regia Aeronautica. Based on a 1939 design by Giovanni Galasso the aircraft did not enter production until 1943. By the time it entered service it was considered obsolete.Two hundred aircraft were ordered, but only 50-75 were produced in two versions, one flown as an interceptor, the other in the role of a ground attack aircraft."@en . . .