| SELLO/STAMP # 804 |
| 1972 “OBSERVATORIO ASTRONOMICO CERRO TOLOLO” |
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| # 804 |
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| # 804 pos 26 | # 804 perf. desplazada |
| Inscripción marg. |
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| # 804 |
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| # 804 | # 804 |
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| # 804 |
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| # 804 PERFORACIÓN CORRIDA |
| SOBRE PRIMER DIA / FIRST DAY COVER |
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