Fantastic collection of 263 FDCs and commemorative covers with cachets honoring the Mercury, Gemini, and Apollo programs, pioneers in rocket science and space exploration, and a vast array of historic NASA launches, rockets, missiles, probes, and satellites. All of the covers are unsigned, with many postmarked between 1959 and 1974 at locations like Cape Canaveral or aboard various recovery ships. Subjects include: Arcas, Apollo mission 1-14, Atlas Intercontinental Missile, Aurora II, Biosatellite program, Courier 1-B, Discoverer 15, Echo I, Ed White II, ESRO 1-B, Explorer VIII, Explorer XVII, Gemini missions 3-12, IMP 7, ISIS 1, ITOS-1, Mariner 6 and 7, Mercury missions (Friendship 7, Sigma 7, and Faith 7), Midas 2, Military Photographic Satellite, Minuteman, NASA Tracking Stations, Nimbus 3, OSO-5, Polaris Underwater Firing, Ranger I, Ranger 5, Robert H. Goddard, Saturn I, Saturn 3 Super Rocket, SERT 2, Surveyor landers 3-7, Syncom, TACCOMSAT, Telstar II, Thor Firing Missile, Tiros VII, Transit 1-B, Transit 111-A, Transit IV-B, U.N. Commission of Peaceful Uses Outer Space, and USS Grayback Missile Mail. Also included are a handful of oversized FDCs and photographs. The covers are housed in three individual hardshell binders. In overall fine condition.