Odd old tool measures 7" long pincher-nipper-tong. No maker marks nice locking handle.
I can see it being used as a soldering clamp.
Neat tool Never seen one.
We had something like this tool on the list not long ago, didn't we?
I sure remember the locking system.
I posted a pair of pliers with a similar locking system but assume these have specific use.
I tend to agree with BruceS,soldering ,brazing or welding
I was thinking about using this to pull, lift sheet metal, that handle bent down would make a good pull point. But clamping for soldering makes real good sense, just why jaws instead of points? Be a bigger heat sink, wouldn't it?