Butuan Ivory Seal

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The Butuan Ivory Seal or BIS is an ivory stamp or seal stamp or a privy seal associated with a Rhinoceros Ivory Tusk ^{[clarification needed]}, dated 9th–12th century, was found in Libertad, Butuan in Agusan del Norte in southern Philippines. Inscribed on the seal is the word Butban in stylized Kawi. Butban was presumed to stand for Butuan. The ivory seal is now housed at the National Museum of the Philippines.^[1]