Issued by Spain in October 1967, this high-value commemorative marks the IV Hispano-American-Filipino Congress of Municipalities held in Barcelona. The design features a symbolic world map linking Spain, the Americas, and the Philippines, alongside a historic sailing ship representing exploration and shared heritage. Printed in a rich violet tone by FNMT, the stamp has strong visual impact and sharp engraved detail. The 150 pesetas denomination made it a premium postal value, often seen on registered or overseas mail. Popular among thematic collectors of maps, maritime history, and Spanish diplomacy issues. A desirable piece for modern Spain commemorative and conference-themed collections.