thank you!I believe it's made by BMC MFG Co of Binghamton, NY.
https://www.ebay.com/sch/i.html?_nkw=BMC no. 7 locking pliers
https://progress-is-fine.blogspot.com/2015/09/vanished-tool-makers-bmc-manufacturing.html
I've got a pair exactly like those among a bunch of rarely used stuff. I'm sure the imprints are quite visible. Gotta dig them out and take a few photos...