It is an old carveing tool used on wood .That one looks quite old .I have some some place that belonged to my grandfather .

It is an old style appolstry tack puller.

most but not all have a curved neck, I used one for two summers as a kid removing coverings from old chairs and couches...this one may have been hand made by the looks of it...the guy I worked for also used it sometimes to seat the piping around the caining he used on kitchen chairs...

It's for pulling weeds, it gets down to the roots. My wife has several she uses in our yard. The design of your tool has been used for many applications. I do recall some of the hand tools of my father-in-laws that looked like that ( he did a lot of wood working), and that's most likely where my wife got hers that she uses for popping those pesky weeds out of the ground.

 

I second the weed puller. I used one that had that same shape when I was young. Had to pull a bucket of weeds before I could go play.

Wrong. Its an Asparagus cutter. Kept good and sharp just slide it into the stalk.