1927 six-pointed star overprints hint at Bolivia's political past
Bolivia - Castlerockstamps
Maps on Stamps : Bolivia | A Database of Cartophilately
Stamp: Gualberto Villarroel and refinery (Bolivia(Assassination of Gualberto Villarroel, 25th Anniv.) Mi:BO Z30,Sn:BO RAC2,Yt:BO PA292,Sg:BO 893
Paraguay
Chaco War - Wikipedia
Bolivia 1947 - FDC - Letter 2 Stamps Card - Rare Stamp - Full Issue | eBay
Maps on Stamps : Bolivia | A Database of Cartophilately
Maps on Stamps : Bolivia | A Database of Cartophilately
Maps on Stamps : Bolivia | A Database of Cartophilately
Bolivia postage stamps hi-res stock photography and images - Alamy
Bolivia's 1935 regular-issue and airmail sets show maps
Maps on Stamps : Bolivia | A Database of Cartophilately
Bolivia 1947 - FDC - Letter 2 Stamps Card - Rare Stamp - Full Issue | eBay
Maps on Stamps : Bolivia | A Database of Cartophilately
Stamp: Peryphrangus dependens (Bolivia(Patriotic Symbols) Mi:BO 1468,Sn:BO 1134,Yt:BO 1084,Sg:BO 1541
Maps on Stamps : Bolivia | A Database of Cartophilately
Paraguay
Bolivia postage stamps hi-res stock photography and images - Alamy
Chaco War - Wikipedia
Chaco War - Wikipedia
Bolivia Scott 226 | Central & South America - Bolivia, General Issue Stamp / HipStamp
Chaco War - Wikipedia
Stamp: Paz del Chaco. Escudos de Países involucrados. 3 pesos of Paraguay America
Stamp: Heroes of the Chaco war (Paraguay(Heroes of the Chaco War) Mi:PY 761,Sn:PY 510,Yt:PY 534,Sg:PY 789
Stamp: IV CENTENARIO FUNDACION DE LA PAZ-1548-1948 Bs.1800 y verde Y rojoof Bolivia America
