Well. while out and about this morning, hunting a bit of rust. Saved three Atkins saws from being taped together, $5? got them for a buck each
This was the easy part, The "What is it"?
Well, the tag said fifty cents. "Jaws" are just under 3-3/4" long/wide. There is one notch for a screw on a base..
Wing nut to tighten things up? Two counter sunk holes for screws. Haven't found a namd anywhere on it. Not much in the way of room inside there, either.
Vise? Clamp? Uses?