Stamps of Argentina, 2nd Rio Plata Philatelists Day issue
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postage
1966, Apr 20 2nd Rio Plata Philatelists Day issue unwmk (6 stamps)
| - | 4p | ltgray & carbrn | — | — | ||
| - | 4p | ltgray & carbrn | imperf | — | — | |
| - | 5p | ltbl & yelgrn | — | — | ||
| - | 5p | ltbl & yelgrn | imperf | — | — | |
| - | 8p | — | — | |||
| - | 8p | imperf | — | — |
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