This stamp belongs to a set of 8, honoring cosmonauts.
Malcolm Scott Carpenter (May 1, 1925 – October 10, 2013), (Commander, USN), was an American naval officer and aviator, test pilot, aeronautical engineer, astronaut, and aquanaut. He was one of the Mercury Seven astronauts selected for NASA's Project Mercury in April 1959. Carpenter was the second American (after John Glenn) to orbit the Earth and the fourth American in space, after Alan Shepard, Gus Grissom, and Glenn. Carpenter was the second north american to orbit the Earth, what he did in the capsule Aurora in may 1962, travelling 5 hours in three orbits around the planet.