Stamps of Rio de Oro, 300 ndenom
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postage
1905, Dec unwmk (no perf info)
| - | 5c | orgred | King Alfonso XIII | — | — |
1907 1907 issue
| - | 5c | blkbrn | King Alfonso XIII | — | — |
1908 ovpted (no wmk info)
| - | 5c | grn | on type=revenue-50c-grn (0) | — | — | |
| - | 5c | grn | on type=revenue-50c-grn (0) | — | — |
1909 unwmk
| - | 5c | King Alfonso XIII | — | — |
1911 1911 issue ovpted
| - | 5c on 10p | grn | King Alfonso XIII | — | — |
1912 1912 issue
| - | 5c | King Alfonso XIII | .20–.30 | .20 |
1914 1914 issue
| - | 5c | King Alfonso XIII | .20–.30 | .20 |
1917 ovpted
| - | 5c | ovpt, King Alfonso XIII | — | — |
1919 1919 issue
| - | 5c | ltgrn | King Alfonso XIII | .30–1.00 | .30–1.00 |
1920 1920 issue
| - | 5c | dpgrn | King Alfonso XIII | .30–1.00 | .30–1.00 |
1921 1921 issue
| - | 5c | King Alfonso XIII | — | — |
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