It looks like someone installed the handle using Bondo or something of that nature....
Since no one else has responded: My gut instinct is that it is a very buggered-up - possible from being used as a wedge - commercial hatchet from the first half of the 20th century, just because the profile of the front edge and the poll seems "off" for an earlier piece and because I don't see a welding seam at the bit nor at the eye. All my knowledge on these things is derived from books, and mine are not with me at the moment, though.