Bulgaria 1963-1964 Space Exploration Set and Souvenir Sheet

Bulgaria · 1963 · Various (1 st to 1 lev)

This set of eleven stamps and a souvenir sheet commemorates early achievements in space exploration. The designs feature various Soviet spacecraft, including the Vostok and Mars 1 probes, and honor cosmonauts like Valentina Tereshkova, the first woman in space. The souvenir sheet specifically celebrates the joint flight of Vostok 5 and Vostok 6.

Issued during the height of the Space Race, this set reflects the Soviet Union's early dominance in space exploration and Bulgaria's political alignment within the Eastern Bloc.