perf 13, no wmk
|Stamps of Rio de Oro surcharged|
|5 centimos on 4 pesetas rose||violet||1||1, 1a †|
|10c on 10p dull violet||red||2||2|
|10c on 10p dull violet||violet||2E||-|
|10c on 10p dull violet||blue||2G||-|
|15c on 50c dark brown||green||3||3a|
|15c on 50c dark brown||red||4||3|
|40c on 1p red-violet||green||5||4a|
|40c on 1p red-violet||red||6||4|
† SG1 is surcharged in rose-carmine, SG1a in blue .
This was an expansion of Spain's Sahara territory with French agreement and administered from Rio de Oro, later renamed Spanish Sahara. It was incorporated into Spanish Sahara in 1950 and ceded to Morocco in 1958.