Vintage vise miller falls?

[blaki4]

Weekend find was going to abuse it. I’m having second thoughts. Opens to 9 1/2” to 9 3/4” it’s well abused no markings or casting stamps. I just want to identify it before. Maybe Soviet technology?

 

[blaki4]

 

[MAD]

This thread from Nov. popped up in my similar thread sidebar.

Member Fierjeppen helped me identify a similar vise I found as a Brainard's parallel traversing vise in this thread: https://www.garagejournal.com/forum/threads/unmarked-vise-with-t-bolt-mount.501345/

I would research
*Union Vise Co. of Boston MA
*Q.S Backus Winchendon, Mass
*Backus Vise Co. Windsor, VT
*Millers Falls Co
if you want to try to narrow down what you have.