Stamps of Costa Rica, 19 Aug 1960
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1960, Aug 19 6th and 7th Chancellors' Reunion Conference, Organization of American States, San Jose issue unwmk p. 10 (6 stamps)
| - | 25c | multi | ||||
| - | 35c | multi | ||||
| - | 55c | multi | ||||
| - | 2col | multi | — | — | ||
| - | 5col | multi | ||||
| - | 10col | multi |
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