This 1966 issue from Spain highlights historical links between Spain and Latin America, commemorating colonial heritage, architecture, early printing, and indigenous communication traditions. The set features four distinct designs: the historic Ceca de Lima 1699 coin, the Convento de Oruro architectural monument, the Inca messenger El Chasqui, and the early missionary publication Doctrina Christiana. Printed by F.N.M.T., these stamps combine cultural, historical, and ethnographic themes, making them especially attractive to collectors of Iberian history, colonial-era subjects, and thematic philately. Complete sets in fine mint condition are particularly valued for thematic exhibitions relating to Hispanic heritage.