1954 Uruguay
1958 Somalia
1970 Malawi
1980 Tanzania
1964 Lebanon
1995 Benin, People's Republic of
1966 Senegal
1958 Tunisia
Commemorative proof cards each feature a stamp from US #2991.
Fleetwood cover set celebrates 11th International Botanical Congress (1969).
Own the largest tax revenue stamp ever issued! Selections vary.