I know nothing about pipes. With that out of the way, if I had to guess, I'd guess this one to be authentic. I can't even tell you why I think that either. ?? Cool piece. I wish you had a little insight on it.
I can say it probably came from New Mexico, but if it would prove to be South American that could also be possible. (Venezuela) But guarantee it never came out of tourist shop.
Hard to say Bravo. I like it. I have seen a large collection south of the border and they used those funky looking faces on everything down there. Especially the Mayans. Not so much here though with the faces. I am not an expert in South American artifacts but bet that is what it is. I think I have one pot that came out when they were doing the Panama canal. It is real but looks fake to me because it is not what I am used to seeing.
Yikkes! I can admit I have always wanted a real authentic pipe. Good luck out there in cyberspace trying to find one. 20 years of "knowitallship" didn't save me from sinking 5 grand on a few fake pipes. Unless I find one or I steal one from the Smithsonian (still no guarantee), I will run a 4.2 away.