I got this 12 inch adjustable and I am stumped up to now as who may have made it. I believe it may be a prototype. It appears to have started out as a 12 inch Crescent style adjustable that has been modified into a quick adjust. Almost all of the original factory markings in the web of the handle have been ground away. On both sides up close to the jaw area you can still see the remnants of the 12 marking. On one side you can still faintly see the remnants of a few letters.
The original screw adjuster has been removed and replaced with a serrated spring loaded latch that can be pulled back to adjust the jaw opening. I believe it still retains the original moveable jaw that has been modified to have serrations that match those on the adjusting slide piece.
I'm looking for suggestions on what make this may have started out life.
The screw that is in the normal position for the adjusting screw axel/retaining screw has a small tip almost like a dog pointed set screw that engages the slide adjuster.