Looks hand made. Each end kind of looks like an antique masons hammer, but usually the other side would be flat not a straight pein as well... It might have started life as a masons hammer, broke or something, so they had the left (in the first picture) end forged down to match...
It might have started like this: (They are two different hammers... with slightly different proportions, but I couldn't find a top view of exactly the right thing for some reason)
![](http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/hD8AAOSwv0tVFFlH/$_35.JPG)
![](http://thumbs4.ebaystatic.com/d/l800/pict/201423657050_1.jpg)