Issued by Argentina, this 20 centavos commemorative honors General Justo José de Urquiza and the centenary of the Palacio San José. The stamp features a clean architectural illustration of the historic red-brick palace against a green field, highlighting Argentina’s national heritage. Printed by Casa de Moneda in 1970, it is part of a classic historical-monument series popular with thematic and architecture collectors. The bold color contrast and wide format give it strong album presence. A desirable piece for Argentina, Latin America, and buildings/topical collections.