Those are pips!!
Skinny ducks. I love em. Big teeth!
When all else fails, old tradition says, its either a coopers tool (which it can't be this time),
or a leathermans tool.
I expect there is a job in saddle/harness making that only this tool does well.
I have some almost just like them, except the jaws on mine flair outward to 3/4" or more wide.
I always assumed leather work.
I suppose they could have been for pulling chair bottom webbing tight. But people usually used a stick with some nails sticking out for that. Kind of a crude lever arrangement, but it worked.
Nope, a tool this nice was probably used in a nice high skill elegant job, like a fine saddle.
yours Scott