This striking 1966 definitive stamp from Indonesia features a left-facing portrait of President Sukarno, the nation’s founding leader. Rendered in a bold red monochrome tone, the design emphasizes simplicity and authority, reflecting the political era of the time. The denomination “80 sen” is clearly displayed alongside “Republik Indonesia,” anchoring it firmly within Indonesia’s early post-independence postal history. The small pentagon mark with the year “1966” adds a subtle design element unique to this issue. This stamp is part of a broader definitive series portraying Sukarno, widely collected for its historical and political significance.