Here is another one where I do not have much of a clue.  It has been hammered on like a chisel, and the tips are rounded and worn like a stone mason's tool.  But there is a barb on one of the tines ??

Looks like it was made from a file or rasp.

This was obviously used, a lot!
I am going to take a WAG and say..............
Pulling oakum from ship seams or large iron drain pipes.

Pound it in and use the plain side to lever against to pull the oakum with the hook.
If both sides were barbed you couldn't get the tool back out
   yours Scott

They'd be very wide seams - and the barb looks sharpened on the inside, it would cut through the thing/substance/object being pulled....

Quote from: leg17 on January 14, 2014, 09:57:46 AM
Looks like it was made from a file or rasp.

Yes, it was made from a horse rasp (rasp on one side, coarse file on the other).  You see a lot of those repurposed into other tools.  I sold a real nice scorp last month that was made from one.