Stamps of Nigeria, 18 base day
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postage
1969, Oct 18 5th Anniversary of African Development Bank issue wmk. mult crown & script CA p. 14
| X | 4p | multi | .20 | .20 | ||
| X | 1sh6p | multi | — | — |
1975, Aug 18 International Women's Year issue
| X | 5k | — | — | |||
| X | 18k | — | — | |||
| X | 30k | — | — |
1982, Nov 18 25th Anniversary of National Museum issue
| - | 10k | multi | .20 | .20 | ||
| - | 20k | multi | Bronze Leopard | — | — | |
| - | 30k | multi | — | — | ||
| - | 45k | multi | — | — |
1990, Jan 18 10th Anniversary of Pan African Postal Union issue
| X | 10k | multi | .20 | |||
| X | 20k | multi | — | — |
2003, Sep 18 Universal Basic Education issue unwmk (no perf info)
| - | 20.00n | multi | — | — | ||
| - | 50.00n | multi | — | — |
2006, Jan 18 literary icons and scientists/inventors (9 stamps)
| - | 20n | multi | Professor Chinua Achebe | — | — | |
| - | 40n | multi | Alh (Dr.) Abubakar Imam | — | — | |
| - | 50n | multi | Professor Wole Soyinka | — | — | |
| - | 50n | multi | Philip Emeagwali | — | — | |
| - | 50n | multi | Prof. Awojobi Ayodele | — | — | |
| - | 50n | multi | Prof. Oyibo Gabriel | — | — | |
| - | 100n | multi | Prof. Awojobi Ayodele | — | — | |
| - | 120n | multi | Prof. Oyibo Gabriel | — | — | |
| - | 150n | multi | Philip Emeagwali | — | — |
2009, Nov 18 10th Anniversary of Demoracy issue
| - | 50n | multi | — | — | ||
| - | 50n | multi | — | — |
2010, Jan 18 30th Anniversary of PAPU issue
| - | 50n | multi | — | — |
2021, Mar 18 45th Anniversary of Abuja issue (no wmk info)
| - | 100n | multi | — | — |
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