North Vietnam, Shoot-Down of the 1,500th U.S.Aircraft over North Vietnam, October 14th, 1966, Michel Nr. 450-451; A single stamp with a 12 xu nominal was issued in perforation 11.0.…
North Vietnam, Shoot-Down of the 2,500th U.S.Aircraft over North Vietnam, November 6th, 1967, Michel Nr. 495-496; Two stamps, both with 12 xu nominal was issued in perforation 11.0. Here…
North Vietnam, Shoot-Down of the 3,500th U.S.Aircraft over North Vietnam, June 20th, 1972, Michel Nr. 697-698; Two stamps, both in 12 xu nominals were issued in perforation 11.0. Here…