I have just seen pics of them also. The ones that I have seen have 2 sides. There is no sign of a new break.are you sure it is broken?....looks like a whole one to me, but then again I just know them from pix.
If it is smooth at the top where the hand would be.........it then is a hand ax. I thought mine was a hoe till I got a few bit more lessons on how to tell the difference from GTP he really knows his stuff. Ill show you my hand ax it looks just like yours but mine is a larger style. Very nice find!