Group of nine airmail covers flown on military jets, all with stamped cachets filled out with information on the flights, signed by the respective pilots. Planes and dates are: YF-96A (June 3, 1950); F-86 Sabre (May 3, 1955); F-86 Sabre (May 20, 1955); F-86 Sabre (March 16, 1956); F-102A (June 18, 1956); F-100 (June 29, 1956); F-104G (June 14, 1963); F-104G (July 26, 1963); and F-101 (September 14, 1964). In overall fine condition.