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postage
1990, Sep 15 14th Congress of the American-Spanish Postal Union issue unwmk (no perf info)
| - | 3000a | multi | Escudo | |||
| - | 3000a | multi | Fragata y aviso ligero | |||
| - | 3000a | multi | Vapor Río Carcarañá | |||
| - | 3000a | multi | Avión AA y camión Encotel |
1990, Oct 13 America 1990 issue
| - | 3000a | multi | ||||
| - | 3000a | multi |
1990, Oct 27 National Parks issue (5 stamps)
| - | 3000a | multi | Pudu pudu | |||
| - | 3000a | multi | Tamandua tetradactyla | |||
| - | 3000a | multi | Euphractus villosus | |||
| - | 3000a | multi | Geranoaetus melanoleucus | |||
| - | 3000a | multi | Cygnus melanocoryphus |
1990, Oct 27 World Post Day 1990 issue
| - | 3000a | multi |
1990, Dec 1 Christmas 1990 issue - stained glass windows by Carlos Quaglia from Church of Immaculate Conception, Villaguay (12 stamps)
| - | 3000a | multi | — | — | ||
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| - | 3000a | multi | — | — | ||
| - | 3000a | multi | — | — |
1990, Dec 1 100th Anniversary of the Salvation Army in Argentina issue
| - | 3000a | multi | ||||
| - | 3000a | multi |
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