This 4 kopeck commemorative stamp was issued by the Soviet Union in 1967 to mark the centenary of the first volume of Karl Marx’s Das Kapital. Designed in brown and red tones, the stamp features a bold portrait of Karl Marx on the left, while the right side reproduces the title page of Das Kapital with German text. The issue reflects the USSR’s strong ideological reverence for Marxist theory, celebrating its enduring influence on socialist thought. A classic collectible linking philately with economic history and political philosophy.