I was cleaning up in an old barn today, and happened upon this device, the use I can’t even imagine. It’s about 3 1/4” long and opens symmetrically. There are small points in the “jaws” and then the adjustable arm with another point on it. Any ideas, anyone?
Update; see comment from reader "pzak" for the most likely identification. I will talk to a watchmaker contact to see how it might be used.