So it was only a few weeks ago when I posted pictures of the large vise I finally acquired, and now this. I'm posting it in the woodworking section because that's what I believe it's for, but I stand to be corrected... It seems too girthy to be a wood vise, but the style, as I understand, is for woodworking. (Mods, feel free to move this if this belongs in a different section).
I found this at a buddy's cabin, neglected under the deck, whilst deer hunting. His dad said I could have it, so into my truck it went. Out of sight, out of mind...
I'm wondering if someone can help me identify it. Not only it's purpose, but perhaps the maker and its general age as well. Any info at all would be great.
The only writing or markings I see are the numbers "10 B" and "3 B." The paint is thick in some areas so it's possible something else is covered up... It opens about 10.5" and the jaws are 7-1/8" wide. This thing is HEAVY, as I said earlier. Much heavier than the woodworking vises I'm familiar with. The bar with the handles has notches, and can be slid back and forth, then locked into position. Those are its most distinguishing features. It also has a raised square on the back area that attaches under a workbench. It doesn't make sense to me because it's seems like it would prevent it from sitting tight when mounted... The front jaw has a 'key hole', presumably for removal, but I haven't tinkered with it enough yet to figure out it's purpose.
Here's a few pictures.



I should also mention that the crank screw is about a 1" thick! And I should also mention that that's my wife's tape measure in the picture... It was the closest thing nearby.