This commemorative stamp from the Philippines marks the 10th Anniversary of the Southeast Asia Treaty Organization (SEATO), 1954–1964. The design features the SEATO emblem at the center, encircled by the national flags of member countries including the United States, United Kingdom, Australia, New Zealand, France, Pakistan, Thailand, and the Philippines. Issued in 1964, the stamp highlights the Philippines’ role in regional security and Cold War–era alliances in Southeast Asia. The deep green background contrasts with the colorful flags, making the emblem stand out prominently. The denomination 10s Koreo reflects the postal rate system used at the time. This issue is a notable thematic piece for collectors of political history, international organizations, and Cold War–era philately.