The Calatangan Pot is a prehispanic (14th-16th century) artefact containing an inscription around the neck. It is said to be one of the earliest expressions of prehispanic writing in the Philippines, and there have been several attempts at translating the inscription. Rolando Borrinaga is the latest person to offer an translation of the script, based on old Bisayan and old Tagalog alphabets. You can read about an earlier attempt to decipher the Calatangan Pot incription by University of the Philippines’ Ramon Guillermo here.
Image from The Daily PCU
The mystery of the ancient inscription
The Inquirer, 23 May 2009