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postage
1973, Sep 4 100th Anniversary of World Meteorological Organization issue unwmk p. 13.25x14
| - | 40c | multi | ||||
| - | 50c | graybl & blk | ||||
| - | 60c | multi |
1990, Apr 17 Abebe Bikila issue (5 stamps)
| - | 5c | multi | .20 | .20 | ||
| - | 10c | multi | .20 | .20 | ||
| - | 20c | multi | ||||
| - | 75c | multi | ||||
| - | 85c | multi |
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