Those do have some patina going on.
We called them nippers or nipping pliers, we used for cutting barb wire, or even cutting heads off nails for horse shoes removal. Have great leverage.
I know I have a couple at home in garage tool box, maybe more if gramps's tools are they yet ( I have 2 brothers).
I have seen these at flea markets asking 15 - 25 $ , I just walk by, don't even touch.
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