Stamps of Rio de Oro, 20c denom
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postage
1909 unwmk (no perf info)
| X | 20c | King Alfonso XIII | — | — |
1912 1912 issue
| - | 20c | King Alfonso XIII | .20–.30 | .20 |
1914 1914 issue
| - | 20c | King Alfonso XIII | .20–.30 | .20 |
1917 ovpted
| - | 20c | ovpt, King Alfonso XIII | — | — |
1919 1919 issue
| - | 20c | King Alfonso XIII | .30–1.00 | .30–1.00 |
1920 1920 issue
| - | 20c | lil | King Alfonso XIII | .30–1.00 | .30–1.00 |
1921 1921 issue
| - | 20c | King Alfonso XIII | — | — |
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