title: Compendium of postage stamp issuers (O)
text: # Compendium of postage stamp issuers (O)
  
  Each "article" in this category is a collection of entries about several stamp issuers, presented in alphabetical order. The entries are formulated on the micro model and so provide summary information about all known issuers.
  
  See the Category:Compendium of postage stamp issuers page for details of the project.
  
  ## Obock
  
  ### Dates
  
      1892 – 1894
  
  ### Capital
  
      Obock
  
  ### Currency
  
      100 centimes = 1 franc
  
  ### Refer
  
      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
  
  ### Refer
  
      Nigerian Territories
  
  ## Oldenburg
  
  ### Dates
  
      1852 – 1867
  
  ### Currency
  
      72 groat = 1 thaler
  
  ### Refer
  
      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
  
  ### Refer
  
      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
  
  ### Refer
  
      Indian Native States
  
  ## Osterreich
  
  ### Refer
  
      Austria
  
  ## Ostland
  
  ### Dates
  
      1941 – 1945
  
  ### Currency
  
      100 pfennige = 1 mark
  
  ### Refer
  
      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
  
  ### Refer
  
      Oubangui-Chari
  