 Other prominent jets designed and produced by this group include the MiG-15, the MiG-17, the MiG-19, the MiG-21, the MiG-23, and the MiG-25.The MiG-15 through the MiG-21 were produced in the mid-1940s into the latter part of the 1950s.The MiG-23 and MiG-25 were not developed until the 1960s.