I don't believe it is a Zaire variant, as I don't see the Zorro mask around the eyes. I also think that if you own a Zaire frontosa, you are going to know about it ($$$). My guess is that this front is a Tanzanian variant- most likely Mpimbwe. It is a little hard to decipher the strip around the eye, but it looks like it may wrap around the top of the jaw. I agree that a full body shot would be more helpful for ID. Check out this link for identification of the different varients of fronts. http://www.cyphos.com/forums/showthread.php?t=11854