Issued in 1951 by the United Nations Postal Administration, this 5-cent blue stamp commemorates the signing of the UN Charter in San Francisco in 1945. The design depicts the War Memorial Opera House, where the founding conference took place, marking the birth of the modern United Nations. The inscription “Birthplace of the Charter” honors the city’s pivotal role in shaping global diplomacy. Multilingual inscriptions—English, French, Russian, Spanish, and Chinese—emphasize the organization’s universal character and mission of unity.