441 selected
- Levant [Austro-Hungarian post offices in Turkey]
- Levant [French post offices in Turkey]
- Levant [Italian post offices]
- Levant [Rumanian post offices in Turkey]
- Levant [Russian post offices]
- Lithuania
- Lombardy–Venetia
- Luxembourg
- Madagascar (British post)
- Madagascar - Illegal Stamps
- Malawi
- Malaysia
- Malaysia - Federal territory
- Malaysia - Occupation by Japan
- Malaysia - Penang
- Malaysia - Perak
- Malaysia - Sabah
- Malaysia - Sarawak
- Malaysia - Sungei Ujong
- Malaysia - Trengganu
- Maldives
- Mali
- Man - Calf of Man - Cinderella
- Martinique
- Mauritania
- Mauritius
- Mayotte
- Mecklenburg-Schwerin
- Memel
- Micronesia
- Moldova
- Moldova - Gagauzia - Illegal Stamps
- Mongolia
- Montenegro
- Montserrat
- Morocco - French post offices
- Morocco - Spanish post offices
- Mozambique
- Mozambique - Companhia de Moçambique
- Nagorno-Karabakh
- Natal
- Nevis
- New Caledonia
- Niger
- Niuafo'ou
- Niue
- North German Postal Area
- North Korea
- North Macedonia
- North Rhodesia
- Northern Nigeria
- Norway - Jul stamps
- Nosy Be
- Nova Scotia
- Oldenburg
- Oman
- Oman - Dhofar - Illegal Stamps
- Oman [State of] - Illegal Stamps
- Pakistan
- Palestine
- Panama
- Papua New Guinea
- People's Democratic Republic of Yemen - PDR (South Yemen [1967-1990])
- Peru
- Philippines - Occupation by Japan
- Pitcairn
- Poland [1946] - Occupation of Italy
- Ponta Delgada
- Portuguese Africa
- Portuguese Congo
- Portuguese Guinea
- Portuguese India
- Prussia
- Puerto Rico
- Qatar
- Rhineland-Palatinate - French Zone
- Rhodesia
- Rio Muni
- Romania - Cinderella
- Romania - Occupation of Hungary Oradea
- Ross Dependency
- Rouad
- Rumania - Occupation of Temesvár
- Russia [1918-1923]
- Russia [1920-1922] - Far Eastern Republic
- Russian Federation
- Russian Federation - Amur Oblast - Illegal Stamps
- Russian Federation - Chechnya - Illegal Stamps
- Russian Federation - Chuvashia - Illegal Stamps
- Russian Federation - Dagestan - Illegal Stamps
- Russian Federation - Kamchatka - Illegal Stamps
- Russian Federation - Karelia - Illegal Stamps
- Russian Federation - Tatarstan - Illegal Stamps
- Russian Federation - Udmurtia - Illegal Stamps
- Rwanda
- S.C.A.D.T.A
- Saar (1920-1935)
- Saint Helena
- Saint Vincent and the Grenadines
- Saint-Pierre and Miquelon
- Sainte-Marie de Madagascar
- Samos
- Saudi Arabia
- Saxony
- Schleswig-Holstein
- Sealand - Cinderella
- Senegal
- Serbia
- Serbia - Occupation of Banat-Backa
- Shanghai
- Singapore
- Sleswick
- Solomon Islands
- Somali Coast - French Protectorate (Côte Française des Somalis)
- Somalia - Puntland - Illegal Stamps
- Somaliland - British Protectorate
- South Africa
- South Kasai
- South Korea
- South Maluku - Cinderella (Maluku Selatan)
- South Yemen [1967-1990] (People's Democratic Republic of Yemen - PDR)
- Southern Rhodesia
- Spain
- Spanish Guinea
- Spanish West Africa
- Sri Lanka (Ceylon)
- Stellaland
- Swaziland (Eswatini)
- Switzerland
- Switzerland - Swiss Post abroad
- Tahiti
- Taiwan
- Tajikistan
- Tajikistan - Illegal Stamps
- Tanganyika
- Tanger - Franse post
- Tangier - British post office
- Tangier - Cinderella
- Tanzania - Illegal Stamps
- Thule
- Tobago
- Togo
- Tokelau
- Transcaucasia
- Transkei
- Transnistria
- Transvaal
- Triest - Venezia Giulia
- Triest - Zone B
- Tristan da Cunha
- Tunisia
- Turkey (Türkiye)
- Türkiye (Turkey)
- Turks and Caicos Islands
- Turks and Caicos Islands - Caicos
- Tuva
- Tuvalu
- Tuvalu - Funafuti
- Tuvalu - Niutao
- Tuvalu - Nukufetau
- Uganda
- Ukraine - Cinderella
- United Arab Emirates - Trucial States
- United Nations - Geneva
- United Nations - Vienna
- United States - Confederate States
- United States Virgin Islands - Cinderella
- Upper Silesia
- Upper Yafa
- Uruguay
- Uzbekistan
- Uzbekistan - Karakalpakstan - Illegal Stamps
- Vathy
- Vatican City
- Venda
- Vietnam
- Vietnam - North Vietnam
- Vietnam [1945-1953] - Democratic Republic
- Vietnam [1963-1976] - Viet Cong
- Vietnam[1951-1954] - State of Vietnam
- Western Australia
- Western Sahara - Illegal Stamps
- Württemberg
- Württemberg - French zone
- Y.A.R. (Yemen [1962-1990] - Arab Republic)
- Yemen - Kingdom [1962-1970]
- Yugoslavia - Cinderella
- Yugoslavia - Istria
- Zambezia
- Zanzibar
- Zanzibar - French post offices
- Not filled in