Τώρα εμφανίζεται Ριό Ντε Ορο - Γραμματόσημα (1910 - 1919) - 6 Γραμματόσημα.
1911
Issue of 1907 Surcharged
WM: Κανένα Διάτρηση: 14
![[Issue of 1907 Surcharged, τύπος M]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/M-s.jpg)
![[Issue of 1907 Surcharged, τύπος M1]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/M1-s.jpg)
![[Issue of 1907 Surcharged, τύπος M2]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/M2-s.jpg)
![[Issue of 1907 Surcharged, τύπος M3]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/M3-s.jpg)
1911
Nos. 29 & 31 Handstamped "HABILITADO - PARA - 15 CENTS"
WM: Κανένα Διάτρηση: 14
![[Nos. 29 & 31 Handstamped "HABILITADO - PARA - 15 CENTS", τύπος N]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/N-s.jpg)
![[Nos. 29 & 31 Handstamped "HABILITADO - PARA - 15 CENTS", τύπος N1]](https://www.stampworld.com/media/catalogue/Rio-de-Oro/Postage-stamps/N1-s.jpg)
