Muri Bhalissa: Kosta Rica - Bolol tal-posta (1970 - 1979) - 23 bolol.
22. February WM: Xejn Perforazzjoni: 16
31. March WM: Xejn Perforazzjoni: 16
| Le. | Tip | D | Kulur | Deskrizzjoni |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 971 | WM | 0.40Col | multi kkulurita | Enterolobium cyclocarpum | 0.29 | - | 0.29 | - | USD |
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| 972 | WN | 0.50Col | multi kkulurita | Felipe J. Alvarado (Founder) | 0.29 | - | 0.29 | - | USD |
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| 973 | WO | 0.60Col | multi kkulurita | 0.29 | - | 0.29 | - | USD |
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| 974 | WP | 3.00Col | multi kkulurita | 0.87 | - | 0.58 | - | USD |
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| 975 | WQ | 10.00Col | multi kkulurita | Paul Harris, Founder of Rotary International | 3.49 | - | 2.91 | - | USD |
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| 971‑975 | 5.23 | - | 4.36 | - | USD |
6. June WM: Xejn Perforazzjoni: 10¾
4. July WM: Xejn Perforazzjoni: 10¾
| Le. | Tip | D | Kulur | Deskrizzjoni |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 980 | WV | 0.35Col | multi kkulurita | Alonso de Anguciana de Gamboa | 0.29 | - | 0.29 | - | USD |
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| 981 | WW | 0.75Col | multi kkulurita | 0.29 | - | 0.29 | - | USD |
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| 982 | WX | 1.00Col | multi kkulurita | 0.29 | - | 0.29 | - | USD |
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| 983 | WY | 2.00Col | multi kkulurita | Diego de Artieda y Chirino | 0.87 | - | 0.58 | - | USD |
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| 980‑983 | 1.74 | - | 1.45 | - | USD |
14. September WM: Xejn Perforazzjoni: 16
21. October WM: Xejn Perforazzjoni: 16
9. November WM: Xejn Perforazzjoni: 10¾
| Le. | Tip | D | Kulur | Deskrizzjoni |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 988 | XD | 0.50Col | multi kkulurita | Our Lady of Mercy Church (R. Ulloa) | 0.58 | - | 0.29 | - | USD |
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| 989 | XE | 1.00Col | multi kkulurita | Christ (F. Pinto de Herrero) | 0.58 | - | 0.29 | - | USD |
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| 990 | XF | 5.00Col | multi kkulurita | St. Francis and the Birds (L. Gonzalez de Saenz) | 1.74 | - | 0.87 | - | USD |
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| 988‑990 | 2.90 | - | 1.45 | - | USD |
16. November WM: Xejn Perforazzjoni: 16
