Issued by the Soviet Union in April 1961, this 10 kopeck commemorative stamp honors the historic spaceflight of Yuri Gagarin, the first human to journey into space. The design shows Gagarin’s portrait inside his space helmet and a stylized red rocket with the Soviet hammer-and-sickle emblem, symbolizing Soviet technological achievement. The date “12-IV-1961” marks the day of the Vostok 1 mission, while the Kremlin silhouette emphasizes national pride. A classic Cold War-era philatelic issue, it celebrates both space exploration and Soviet triumph. Highly sought by collectors of space-themed philately.