Now showing: Rio de Oro - Postage stamps (1905 - 1921) - 13 stamps.
1912
King Alfonso XIII - Control Number on Back Side
WM: None Perforation: 13
![[King Alfonso XIII - Control Number on Back Side, type O]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O1]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O1-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O2]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O2-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O3]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O3-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O4]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O4-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O5]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O5-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O6]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O6-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O7]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O7-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O8]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O8-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O9]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O9-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O10]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O10-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O11]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O11-s.jpg)
![[King Alfonso XIII - Control Number on Back Side, type O12]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/O12-s.jpg)
| No. | Type | D | Color | Description |
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| 69 | O | 1C | rose | 0.26 | - | 0.26 | - | USD |
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| 70 | O1 | 2C | purple | 0.26 | - | 0.26 | - | USD |
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| 71 | O2 | 5C | green | 0.26 | - | 0.26 | - | USD |
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| 72 | O3 | 10C | salmon | 0.26 | - | 0.26 | - | USD |
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| 73 | O4 | 15C | brownish orange | 0.26 | - | 0.26 | - | USD |
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| 74 | O5 | 20C | brown | 0.26 | - | 0.26 | - | USD |
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| 75 | O6 | 25C | blue | 0.26 | - | 0.26 | - | USD |
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| 76 | O7 | 30C | violet | 0.26 | - | 0.26 | - | USD |
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| 77 | O8 | 40C | greenish blue | 0.26 | - | 0.26 | - | USD |
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| 78 | O9 | 50C | purple red | 0.26 | - | 0.26 | - | USD |
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| 79 | O10 | 1Pta | brick-red | 2.65 | - | 2.65 | - | USD |
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| 80 | O11 | 4Pta | purple red | 6.36 | - | 6.36 | - | USD |
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| 81 | O12 | 10Pta | blackish brown | 10.60 | - | 10.60 | - | USD |
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| 69‑81 | 22.21 | - | 22.21 | - | USD |
