Old Sepik River Mask

I won this on an ebay auction. It was listed as an African mask, but i recognized it right away as a very good Sepik River mask from Papua New Guinea. There is something written inside of it too - something like 'PO-TA'. ?? it's a great time to buy great masks from all over the world. The prices have dropped so much that you can find some very nice masks for excellent prices. I've always loved interesting masks!