Early Prentiss 912 with Lewis pat.
Older Prentiss (#912) that carries the Lewis Vise pat. insigne. It has the Lewis twin beam & semi-exposed screw. Also the Lewis pat. swivel base and swivel jaw. It is the same vise that lewis had sold earlier as #12.
Found this in one of my father's sheds ten years ago after he passed. It was amongst tools and traps that he had kept from his father. His father Erlon was once president of the Maine Trappers Association. He worked as a millwright for the Oxford Paper Co. in Rumford Maine.
u/hootmg — 5 days ago