This striking 4-kopeck stamp from the Soviet Union, issued in 1967, celebrates Cosmonautics Day, the annual commemoration of Yuri Gagarin’s historic first manned space flight on April 12, 1961. The design depicts a cosmonaut performing an extravehicular activity (spacewalk) tethered to a spacecraft, symbolizing the USSR’s achievements in human space exploration. The spacecraft and astronaut are rendered in blue and violet hues against a dark cosmic background, with the denomination and a red star accent on the right. Inscribed “ПОЧТА СССР” (Post of the USSR), it embodies the pride of the Soviet space program during the Space Race era.