I found this peculiar (to me) little hammer in some passed down
items from a former rockhound (among other pursuits). He was a full
fledged craftsman, for sure.
I plan to clean it up and add it to my texturing hammer collection,
but still would love to know it's original purpose.
To my eyes, which aren't all that educated yet, the deep-ish divot
in the center of one head, and the very deep underside groove on the
same side both 'look' like they were part of the original design. The
small cutout on the top of the hammer, breaking the surface above the
deep groove seems to look like an after-market adaptation. I'm just
guessing at all of that, however!
I've attached a few pictures - excuse the quality, I snapped them
with my phone just now. The only side not pictured is the other head,
which, though worn, is a typical flat square face.
Total Side Note and Off Topic: I mention him as a rockhound first,
because this particular hammer was in the same box as one rough cut
rock (5-8+lbs), and several smaller cuts of beautifully rich dark
red jasper. (I'm not a lapidary, at all, but I'll be taking the stone
to my local gem/mineral society, in hopes to trade the rough in for