Now showing: Rio de Oro - Postage stamps (1905 - 1921) - 13 stamps.
1920
King Alfonso XIII - Blue Control Number on Back Side
WM: None Perforation: 13
![[King Alfonso XIII - Blue Control Number on Back Side, type S]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S1]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S1-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S2]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S2-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S3]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S3-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S4]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S4-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S5]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S5-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S6]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S6-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S7]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S7-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S8]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S8-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S10]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S10-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S11]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S11-s.jpg)
![[King Alfonso XIII - Blue Control Number on Back Side, type S12]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/S12-s.jpg)
| No. | Type | D | Color | Description |
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| 121 | S | 1C | purple | 0.78 | - | 0.78 | - | USD |
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| 122 | S1 | 2C | rose | 0.78 | - | 0.78 | - | USD |
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| 123 | S2 | 5C | orange red | 0.78 | - | 0.78 | - | USD |
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| 124 | S3 | 10C | reddish purple | 0.78 | - | 0.78 | - | USD |
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| 125 | S4 | 15C | brown | 0.78 | - | 0.78 | - | USD |
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| 126 | S5 | 20C | green | 0.78 | - | 0.78 | - | USD |
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| 127 | S6 | 25C | orange | 0.78 | - | 0.78 | - | USD |
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| 128 | S7 | 30C | blue | 4.16 | - | 10.41 | - | USD |
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| 129 | S8 | 40C | orange | 2.60 | - | 5.20 | - | USD |
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| 130 | S9 | 50C | purple red | 2.60 | - | 5.20 | - | USD |
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| 131 | S10 | 1Pta | green | 2.60 | - | 5.20 | - | USD |
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| 132 | S11 | 4Pta | rose | 5.20 | - | 10.41 | - | USD |
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| 133 | S12 | 10Pta | brown | 12.49 | - | 20.82 | - | USD |
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| 121‑133 | 35.11 | - | 62.70 | - | USD |
