Stamps of Rio de Oro, 900 ndenom
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postage
1905, Dec unwmk (no perf info)
| - | 15c | redbrn | King Alfonso XIII | — | — |
1906 ovpted
| - | 15c on 25c | dkbl | King Alfonso XIII | — | — |
1907 1907 issue
| - | 15c | dkbl | King Alfonso XIII | — | — |
1908 1908 provisional issue ovpted King Alfonso XIII (5 stamps)
| - | 15c on 25c | dpgrn | King Alfonso XIII | — | — | |
| - | 15c on 1p | org | King Alfonso XIII | — | — | |
| - | 15c on 1p | org | King Alfonso XIII | — | — | |
| - | 15c on 1p | org | King Alfonso XIII | — | — | |
| - | 15c on 75c | orgbrn | King Alfonso XIII | — | — |
1909
| - | 15c | King Alfonso XIII | — | — |
1910 1910 issue ovpted
| - | 15c on 4p | blgrn | King Alfonso XIII | — | — | |
| - | 15c on 3p | dlvio | King Alfonso XIII | — | — |
1911 1911 issue ovpted
| - | 15c on 3p | blgrn | King Alfonso XIII | — | — | |
| - | 15c on 5p | red | King Alfonso XIII | — | — |
1912 1912 issue
| - | 15c | King Alfonso XIII | .20–.30 | .20 |
1914 1914 issue
| - | 15c | King Alfonso XIII | .20–.30 | .20 |
1917 ovpted
| - | 15c | ovpt, King Alfonso XIII | — | — |
1919 1919 issue
| - | 15c | King Alfonso XIII | .30–1.00 | .30–1.00 |
1920 1920 issue
| - | 15c | yel | King Alfonso XIII | .30–1.00 | .30–1.00 |
1921 1921 issue
| - | 15c | King Alfonso XIII | — | — |
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