Rafngard, your picture and example is in that region of the Negritos, also known as the Aeta. Very relevant to this topic, thank you for posting this.
David R, I had no idea. I learned, thank you. It probably is a loan word, another name for the same piece in Pamgangan called a tabak. I personally question that the attribution of that particular piece, and may have been traded in to that area.
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