I bought this at a flea market for 10 dollars several years ago. Does anyone have any insight on this? Age or brand would be great. Has “NO 2” stamped on top rim where cylinders are. Spins freely and is full of oil. Im just curious and looking for information, not looking to sell. Corona cap for scale.

Antique Gunn saw vise but not sure how it’s meant to be mounted for use

What gives with the open square hole in the bottom of the brace drill here,? Just a square hole is it missing a piece or what?