This striking Paraguayan stamp, denominated 150 Pesos, features a detailed map of the Chaco Boreal region. Issued during the period of the Chaco dispute with Bolivia, it boldly asserts Paraguay’s claim with the patriotic inscription “Ha sido, es y será del Paraguay” (“It has been, is, and will be of Paraguay”). The design includes neighboring countries and key rivers, framed by shields at the base. A powerful historical piece, it reflects both philatelic artistry and national identity, making it highly desirable for collectors of South American or geopolitical themes.