Mongolian Stamp

Stamps from Mongolia

On the left is Laika. The text across the bottom reads "SPUTNIK 2 * 3.11.1957 * FIRST DOG IN SPACE"

On the right is a dog whose identity we haven't figured out yet.

 Mongolian Stamp

Could be Sputnik 1? Could be Sputnik 2? Could be Sputniks 1, 2, & 3?

Stamps from China commemorating major events in the Soviet space program.

Since we don't read Chinese, we have guessed that the red stamp on the left depicts Sputnik I; the blue one in the middle is probably Sputnik II; and we imagine that the green image on the right shows Sputniks I through III circling the Earth.