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postage
1988, Jun 1 FINLANDIA '88 issue unwmk p. 12.5x12.25
| - | 16c$ | multi | Boeing CH-46 A |
1988, Aug 27 Heroes of Revolution
| - | 16c$ | grnol | Silvio Mayorga Delgado |
1988, Aug 30 flowers (1988 Nicaragua) p. 12.75
| - | 16c$ | multi | Telpeia speciosissima |
1988, Sep 20 insects (1988 Nicaragua)
| - | 16c$ | multi | Ceratotrupes bolivari |
1 to 4 of 4