DescriptionStamp18211971.jpg English: One of the Greek stamps, issued in 1971, on the 150th anniversary of the Greek Revolution of 1821 showing the Battle
DescriptionMissouri statehood 1971 U.S. stamp.1.jpg English: Missouri statehood’s 150th anniversary was commemorated with an 8-cent stamp on May 8, 1971. The vignette
DescriptionDBPB 1971 401 Hermann von Helmholtz.jpg English: 150th birthday of Hermann von Helmholtz (1821–1894) Deutsch: 150. Geburtstag von Hermann von
DescriptionStamp 1968 VAE-RK MiNr0232A pm B002.jpgStamp of the United Arab Emirates; 1968; Emirate Ras al-Khaima; 1964-1971 British protectorate, released