Flea market find, African or Polynesian? Any clue?

Found this at a flea market this summer. It was really sun bleached and I used linseed oil to bring the wood back. There are no markings or labels. The mask measures 2' 8" long x 8.5" wide. It weighs 4.6 lbs. very solid, eyes are cut out. I paid only $5. Any clue?

Thanks

Indonesian, maybe Bali to narrow it down is my guess.