United Nations
1958 8¢ UN Symbol
1962 1¢ To live together...
1968 6¢ Weather Watching
1972 95¢ Letter Changing Hands
1974 2¢ Dove and UN Emblem
1979 5¢ Hand holding olive
1981 20¢ Costa Rica
1982 40¢ Sun, plant, water, earth (stylized)
1988 25¢ 40th Anniversary of Declaration of Human Rights
1993 5¢ United Nations
1997 8¢ United Nations
2009 1¢ Cielo Rosado
2010 15¢ Ruby-throated hummingbird (Archilochus colubris)
2011 98¢ Drottningholm Castle
2012 45¢ Sport for Peace, 2012 Paralympic Summer Games, London