Sorry Deuce... actually I'm interested but had no idea. A smart remark means I'm subscribed to this thread so I will find out when you do. Hope you didn't take the crack at humor wrong! Welcome to TBN!Thanks Dave, that's a much better answer than the last one. Makes sense, too. Could be for the twine tying up the square bales.
I'm going to say that it's a sickle blade grinder used to sharpen the sicles on a mower or binder. You could clamp it onto the sickle bar and move it back and forth to sharpen between different sickles