I've never seen one like this before or since. Marked "Craftsman Tool Co., Conneaut, O Pat. Nov. 1907.
Watch your fingers. Those can be dangerous.
Not the company that Sears, Roebuck & Company paid $500 for the rights to the Craftsman name, by the way, which was Marion-Craftsman, in Marion, Indiana. Perhaps an earlier forerunner of the same company, when it was located in Conneaut, Ohio, but I can't recall if that's the case or not. Other examples have been posted here before, but not by me. Still hoping to run into one in the wild, just for the novelty, and for my "Oddfellows" collection. If you like weirdass adjustables, you may enjoy that thread linked
here.
Nice find!
Lawson Ushco Mfg co, Buffalo, NY
If you search on Lawson Ushco you'll find a thread on these and the interesting origins of the company. EDIT:
Here is a link.
I can't read enough of the stamp to tell who made it.
Looks like it could be a Peck, Stow, and Wilcox.