1969-05-18 USA Apollo 10

Apollo 10 crew signed Heritage Crafts launch cover with a Kennedy Space Center machine cancel dated May 18, 1969, directly from the family collection of astronaut Richard Gordon. Apollo 10 was a rehearsal for the Apollo 11 moon landing mission. The objective of this mission was to test all components and procedures, but not the actual landing on the Moon. Signed by Gene Cernan, John Young and Tom Stafford. From the Family Collection of Astronaut Richard Gordon. - Heritage Auctions
Apollo 10 official NASA cachet on cover with a Kennedy Space Center machine cancel. Signed by Tom Stafford, John Young and Gene Cernan. - RRAuction
Apollo 10 mission's call signs included the names of the Peanuts characters Charlie Brown and Snoopy, which became Apollo 10's semi-official mascots. This cover has a printed cachet of Snoopy sleeping on top of the Lunar Module.
Apollo 10 USS Princeton captain's cover, machine cancelled May 26, 1969.
Apollo 10 USS Princeton recovery ship cover with a very rare hand cancel and a black Beck rubber stamped cachet. Beck stamped cachet in magenta with USS Princeton machine cancel is commonly found on covers.
Apollo 10 USS Princeton recovery ship cover with Beck rubber stamped cachet. Signed by John Young, Gene Cernan and Tom Stafford. The signatures were obtained from NovaSpace signing sessions (comes with certificates). - RegencyStamps
Apollo 10 USS Princeton recovery ship cover with Beck rubber stamped cachet. Signed by NASA recovery team leader Charles Filley, commander of the Pacific-based Task Force 130 Rear Adm. Frederick E. Bakutis, astronaut Gene Cernan, commanding officer Captain Carl Mann Cruse, helo recovery pilot Cdr. Charles B. Smiley.