Compendium of postage stamp issuers (O)
# 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
