This striking 30 centavos red stamp was originally issued under U.S. administration for the Philippine Islands, depicting the historic “Blood Compact” between Spanish explorer Miguel López de Legazpi and Datu Sikatuna of Bohol in 1565. The bold “COMMONWEALTH” black overprint was added in 1935 to mark the establishment of the Philippine Commonwealth, a transitional government ahead of full independence. These overprints are highly collectible as they represent a pivotal moment in Philippine history, bridging colonial administration and national self-governance. A must-have for specialists in U.S. Possessions or Philippine philately.