Obock
Dates: 1892 - 1894
Capital: Obock
Currency: 100 centimes = 1 franc
Album: Djibouti
Occupation Francaise
Refer: Arad (French Occupation)
Occupied Enemy Territories (TEO)
Refer: Syria (French Occupation)
Oceanic Settlements
Refer: French Oceanic Settlements
Oil Rivers Protectorate
Dates: 1892 - 1893
Capital: Enugu
Currency: 12 pence = 1 shilling; 20 shillings = 1 pound
Album: Nigerian Territories
Oldenburg
Dates: 1852 - 1867
Currency: 72 grote = 1 thaler
Album: German States
Olonetz
Refer: Aunus (Finnish Occupation)
Olsztyn
Refer: Allenstein
Oltre Giuba
Refer: Jubaland
* Oman
Dates: 1971 -
Capital: Muscat
Currency: 1000 baizas = 1 rial saidi
See also: Muscat;
Muscat & Oman
OMF
Refer: Syria (French Occupation)
ONF Castellorizo
Refer: Castelrosso (French Occupation)
Orange Free State
Dates: 1868 - 1900
Capital: Bloemfontein
Currency: 12 pence = 1 shilling; 20 shillings = 1 pound
Album: Orange River Colony
* Orange River Colony
Dates: 1900 - 1907
Capital: Bloemfontein
Currency: 12 pence = 1 shilling; 20 shillings = 1 pound
Includes: Orange Free State
Orchha
Dates: 1913 - 1939
Currency: 12 pies = 1 anna; 16 annas = 1 rupee
Album: Indian Native States
Osterreich
Refer: Austria
Ostland
Dates: 1941 - 1945
Currency: 100 pfennige = 1 mark
Album: German Occupation Issues (WW2)
Ottoman Empire
Refer: Turkey
* Oubangui - Chari
Dates: 1922 - 1937
Capital: Bangui
Currency: 100 centimes = 1 franc
Includes: Oubangui-Chari-Tchad
See also: Central African Republic;
French Equatorial Africa
Oubangui - Chari - Tchad
Dates: 1915 - 1922
Capital: Bangui
Currency: 100 centimes = 1 franc
Album: Oubangui-Chari