Fiscal and repuplican stamps overprinted. Air Mail. 1937 Burgos-Brussels (Belgium).
Fiscal and repuplican stamps overprinted. Air Mail. 1937 Burgos-Brussels (Belgium).
Fiscal stamps overprinted. Air Mail. 1937 Burgos-Ourense.
Republican overprinted Stamps. Priority Mail. 1937 Seville-Burgos.
Republican overprinted Stamps. Priority Mail. 1937 Seville-Burgos.
Republican overprinted Stamps. Priority Mail. 1937 Valladolid-Burgos.
Republican overprinted Stamps. Priority Mail. 1937 Seville-Ibiza (Balearics).
Republican overprinted Stamps. Priority Mail. 1937 Burgos-Seville.
Fiscal and repuplican stamps overprinted. Air Mail. 1937 Burgos-Brussels (Belgium).
Fiscal stamps overprinted. Air Mail. 1936 Burgos-Brussels (Belgium).
Fiscal and repuplican stamps overprinted. Air Mail. 1937 Burgos-Vienna (Austria).
Fiscal stamps overprinted. Air Mail. 1937 Burgos-Leipzig (Germany).
National overprinted Stamps. Air Mail. 1937 Burgos-Huesca.
"Derecho de Entrega" overprinted. Priority Mail. 1937 Ourense-Burgos.
"Derecho de Entrega" overprinted. Priority Mail. 1937 Ourense-Burgos.
Fiscal stamps overprinted. 1937 Ourense-Paris (France).
Fiscal and republican stamps overprinted. Priority Mail. 1937 Burgos-Ourense.
Fiscal and repuplican stamps overprinted. Air Mail. 1937 Pontevedra-London (England).
Republican overprinted Stamps. Air Mail. 1937 Burgos-Leipzig (Germany).
Republican overprinted Stamps. Air Mail. 1937 San Sebastian-Erlenbach (Zurich, Switzerland).
Republican overprinted Stamps. Air Mail. 1937 Burgos-Brussels (Belgium). Overprint type II.
Republican overprinted Stamps. Air Mail. 1937 Burgos-Brussels (Belgium). Overprint type I.
Republican overprinted Stamps. Air Mail. 1937 Burgos-Brussels (Belgium).
National overprinted Stamps. Priority Mail. 1937 Burgos-Tetouan (Morocco).
National overprinted Stamps. Priority Mail. 1937 Burgos-La Coruña-Burgos.
Fiscal stamps overprinted. Priority Mail. 1936 Burgos-Antequera (Malaga).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Santa Cruz de Tenerife-San Sebastian.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Palma de Mallorca (Balearics)-San Sebastian.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 La Coruña-Hamburg (Germany).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 San Sebastian-Palma de Mallorca (Balearics).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 San Sebastian-Las Palmas (Canary Islands).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 San Sebastian-Las Palmas (Canary Islands).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Vitoria-Vatican City.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 San Sebastian-Zurich (Switzerland).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 San Sebastian-Seville.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 San Sebastian-Palma de Mallorca (Balearics).
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Burgos-Ourense.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Bilbao-Burgos.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Bilbao-Zaragoza.
Historical monuments. Souvenir sheet overprinted. Air Mail. 1938 Vitoria-Bremen (Germany).