Stamps of United Nations, 18 base day
1 to 48 of 48
postage
1959, May 18 UN Economic Commission for Europe issue unwmk (no perf info)
| X | 4c | bl | ||||
| - | 8c | orgred |
1961, Sep 18 Economic Commission for Latin America issue
| - | 4c | Gear wheel over map | .20 | .20 | ||
| - | 11c | Gear wheel over map |
1968, Apr 18 UN Industrial Development Organization issue
| - | 6c | multi | .20 | .20 | ||
| - | 13c | multi |
1974, Oct 18 World Population Year issue
| - | 10c | multi | .20 | |||
| - | 18c | multi |
1977, Nov 18 Peaceful Uses of Atomic Energy 1977 issue
| - | 13c | multi | .20 | .20 | ||
| - | 18c | multi |
1983, Mar 18 International Maritime Organization issue
| - | 20c | multi | ||||
| - | 37c | multi |
1984, Apr 18 World Heritage - UNESCO 1984 issue
| - | 20c | multi | ||||
| - | 50c | multi |
1987, Sep 18 flags (1980) (16 stamps)
1988, Mar 18 "Survival of the Forests" issue
| - | 25c | multi | ||||
| - | 44c | multi |
1994, Mar 18 Endangered Species 1994 issue - Endangered Species (1994 United Nations)
| - | 29c | multi | Pan troglodytes | |||
| - | 29c | multi | Amazona versicolor | |||
| - | 29c | multi | Crocodylus acutus | |||
| - | 29c | multi | Gazelle dama |
1999, Nov 18 Education - Keystone to the 21st Century issue
| - | 33c | multi | ||||
| - | 60c | multi |
2001, Sep 18 40th Anniversary of the Death of Dag Hammarskjold issue
| - | 80c |
2001, Oct 18 50th Anniversary of United Nations Postal Administration issue
| - | 34c | multi | ||||
| - | 80c | multi | ||||
| - | $1 | multi |
2008, Sep 18 International End of Poverty Day issue
| - | 42c | multi | ||||
| - | 94c | multi |
2010, Oct 18 International Year of Biodiversity issue
| - | 15c | multi | .20 | |||
| - | $1.50 | multi |
2014, Sep 18 Global Education First Initiative (GEFI) issue
| - | $1.15 | multi | Teachers with Students for Classes in the Woods | — | — |
airmail
1968, Apr 18
| X | 20c | multi | plane |
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