Stamps of Rio de Oro, COLONIA DE RIO DE ORO inscription
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postage
1917 ovpted unwmk (no perf info)
| - | 50c | lake | ovpt, King Alfonso XIII | — | — | |
| - | 1p | orgred | ovpt, King Alfonso XIII | — | — | |
| - | 4p | cl | ovpt, King Alfonso XIII | — | — | |
| - | 10p | brn | ovpt, King Alfonso XIII | — | — |
1919 1919 issue King Alfonso XIII (13 stamps)
| - | 1c | brn | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 2c | cl | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 5c | ltgrn | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 10c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 15c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 20c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 25c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 30c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 40c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 50c | King Alfonso XIII | .30–1.00 | .30–1.00 | ||
| - | 1p | King Alfonso XIII | 1.00–10. | 1.00–10. | ||
| - | 4p | King Alfonso XIII | 1.00–10. | 1.00–10. | ||
| - | 10p | King Alfonso XIII | 1.00–10. | 1.00–10. |
1920 1920 issue King Alfonso XIII (13 stamps)
| - | 1c | blgrn | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 2c | olbrn | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 5c | dpgrn | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 10c | ltred | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 15c | yel | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 20c | lil | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 25c | dpbl | King Alfonso XIII | .30–1.00 | .30–1.00 | |
| - | 30c | dkbrn | King Alfonso XIII | 1.00–10. | 1.00–10. | |
| X | 40c | pink | King Alfonso XIII | 1.00–10. | 1.00–10. | |
| - | 50c | brtbl | King Alfonso XIII | 1.00–10. | 1.00–10. | |
| - | 1p | redbrn | King Alfonso XIII | 1.00–10. | 1.00–10. | |
| - | 4p | dkvio | King Alfonso XIII | 1.00–10. | 1.00–10. | |
| - | 10p | org | King Alfonso XIII | 1.00–10. | 1.00–10. |
1921 1921 issue King Alfonso XIII (13 stamps)
| - | 1c | yel | King Alfonso XIII | — | — | |
| - | 2c | redbrn | King Alfonso XIII | — | — | |
| - | 5c | King Alfonso XIII | — | — | ||
| - | 10c | King Alfonso XIII | — | — | ||
| - | 15c | King Alfonso XIII | — | — | ||
| - | 20c | King Alfonso XIII | — | — | ||
| - | 25c | King Alfonso XIII | — | — | ||
| - | 30c | King Alfonso XIII | — | — | ||
| - | 40c | King Alfonso XIII | — | — | ||
| - | 50c | King Alfonso XIII | — | — | ||
| - | 1p | King Alfonso XIII | — | — | ||
| - | 4p | King Alfonso XIII | — | — | ||
| - | 10p | dkbrn | King Alfonso XIII | — | — |
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