Oh, it's the little one, I gots one a little bigger. I still managed to twist the screw out of it, with a 6' cheater bar, back when I was 18. It was my first welding shop project in college welding. Managed to weld it back together, it was friction welded, 'fore I broke it, I migged it back, but got it almost 1/8" from true, but it still works!
I believe Parker was made in Baltimore, IIRR.