1950s-70s USA and Russia philatelic covers that are related to the early satellites development, manned and unmanned spaceflights to the moon.
1972-12-07 USA Apollo 17
1972 Apollo 17 crew signed moon landing cover. An attractive multicolor cover made from a lunar chart with the Apollo 17 Mission logo at left. Cover signed in black by Astronauts Gene Cernan, Ron Evans and Harrison Schmitt. - RegencyStamps