מוצג עכשיו ריו דה אורו - בולי דואר (1905 - 1921) - 13 בולים.
1912
King Alfonso XIII - Control Number on Back Side
WM: אף לא אחד נקוב: 13
![[King Alfonso XIII - Control Number on Back Side, סוג O]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O1]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O1-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O2]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O2-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O3]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O3-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O4]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O4-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O5]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O5-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O6]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O6-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O7]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O7-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O8]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O8-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O9]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O9-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O10]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O10-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O11]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O11-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, סוג O12]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O12-s.jpg)
| מס. | סוג | D | צבע | תיאור |
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| 69 | O | 1C | ורוד | 0.29 | - | 0.29 | - | USD |
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| 70 | O1 | 2C | סגול | 0.29 | - | 0.29 | - | USD |
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| 71 | O2 | 5C | ירוק | 0.29 | - | 0.29 | - | USD |
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| 72 | O3 | 10C | סלמון | 0.29 | - | 0.29 | - | USD |
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| 73 | O4 | 15C | חום כתום | 0.29 | - | 0.29 | - | USD |
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| 74 | O5 | 20C | חום | 0.29 | - | 0.29 | - | USD |
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| 75 | O6 | 25C | כחול | 0.29 | - | 0.29 | - | USD |
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| 76 | O7 | 30C | סגול | 0.29 | - | 0.29 | - | USD |
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| 77 | O8 | 40C | כחול ירקרק | 0.29 | - | 0.29 | - | USD |
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| 78 | O9 | 50C | סגול אדום | 0.29 | - | 0.29 | - | USD |
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| 79 | O10 | 1Pta | אדום כתום | 2.91 | - | 2.91 | - | USD |
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| 80 | O11 | 4Pta | סגול אדום | 6.97 | - | 6.97 | - | USD |
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| 81 | O12 | 10Pta | חום שחרחר | 11.62 | - | 11.62 | - | USD |
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| 69‑81 | 24.40 | - | 24.40 | - | USD |
