Issued by Deutsche Bundespost, this 30-Pfennig commemorative honors the philosopher and mathematician Gottfried Wilhelm Leibniz (1646–1716), one of Germany’s greatest intellectual figures. The design features a finely engraved portrait framed within a deep carmine oval, highlighting the Baroque era styling associated with Leibniz’s lifetime. Part of the 1966 series celebrating German cultural figures, this stamp is valued for its clean typography, crisp portrait rendering, and historical significance. A desirable classic for collectors of German commemoratives, scientists on stamps, and 20th-century Europa-era issues.