Nubian Monument Campaign September 30, 2013 1964 1965 1967 1980 Egypt Gabon Maldives ofdc unesco + Uruguay 1964 1965 1967 1980 Egypt Gabon Maldives ofdc unesco Uruguay
Royal Geographic Society April 23, 2012 1980 Isle of Man megalith Neolithic +0 ofdc 1980 Isle of Man megalith Neolithic ofdc
Mesa Verde October 17, 2011 1977 1980 1984 ArtCraft cancel +4 ceramic lithic ofdc postcard postcrossing Sarzin unesco USA 1977 1980 1984 ArtCraft cancel ceramic lithic ofdc postcard postcrossing Sarzin unesco USA
Inuit Series October 05, 2011 1977 1978 1979 1980 antler cachet Canada ivory + ofdc 1977 1978 1979 1980 antler cachet Canada ivory ofdc