I think that mask is a flat-out hoax - the patina on it is not right for starters, looks more polished, too much 'shine' on it from something manmade. Then look closely at the eye holes and how fresh the wood is on the inside, no apparent aging at all. Any reputable person in the wood antiques type of business would IMO quickly label this as a recent reproduction - the mouth, eyes, eyebrows are way too crisp and clean and I got a crisp $20 says there are no wear marks on the inside, nor back right behind the eyes on the edge where hands would have grabbed the mask to put it on, though the picture does not allow for close examination.