Austria-Hungary
Belgium
Brazil
Denmark
France
Germany
Great Britain and Northern Ireland
Italy
Netherlands
Portugal
Russia
Spain
Switzerland
United States of America
Albania
Bulgaria
China2,3
Czechoslovakia4
Egypt
Estonia
Finland
Ireland
Latvia
Luxembourg
Monaco
Norway
Poland
Romania
San Marino
Siam
Australia
Bahamas
Barbados
Basutoland
Bechuanaland
Belgian Congo
and Ruanda-Urundi
Bermuda
British East Africa
British Guiana
British Honduras
Canada
Ceylon
Cyprus
Falkland Islands (Malvinas)
Fiji
Gambia
German Colonies
Gibraltar
Gilbert and Ellice Islands
Gold Coast
Hong Kong2
Iceland and Danish West Indies
India
Iraq
Jamaica
Kenya
Leeward Islands
(Antigua, Dominica, Montserrat, St. Kitts-Nevis)
Malay States
Malta
Mauritius
Netherlands East Indies, Surinam and Curaçao
Newfoundland
New Zealand
Northern Nigeria
Northern Rhodesia
Nyasaland
Palestine
St. Helena
Samoa
Seychelles
Sierra Leone
Solomon Islands
Somaliland
Southern Nigeria
Southern Rhodesia
South West Africa
Straits Settlements
Swaziland
Tanganyika
Transjordan
Trinidad and Tobago
Turks and Caicos Islands
Uganda
Union of South Africa
Virgin Islands
Wei-hai-wei
Western Pacific Islands
Windward Islands (Grenada, St. Lucia, St. Vincent)
Zanzibar
Afghanistan
Colombia
Cuba
Salvador
Greece
Guatemala
Iran
Japan
Mexico
Paraguay
Turkey
Yugoslavia (former)5