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airmail
1940, Apr 13 50th Anniversary of Pan-american Union issue unwmk (no perf info)
| - | 14c | multi |
1942, Sep 15 100th Anniversary of the Death of General Francisco Morazan issue
| X | 14c | blk |
1978, Aug 29 100th Anniversary of the Birth of Luis Landa issue
| - | 14c | multi |
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