Picked these up yesterday, my first York, a 100, a medium duty Wilton, a Craftsman, and a 3" Heuer, also a first of that brand for me. On the York, there doesn't seem to be anything to center the vise on the swivel base? When the 2 nuts are loosened, the vise floats all around, hanging off the swivel base. I'm sure I can make something, but curious how they came OEM, no signs there ever was anything. Anybody else have any kind of centering pin on their York?
Took the Heuer apart, appears to be really well made. Disassembly was easy till I tried to remove the main screw and handle. Removed the tiny retaining screw, but main screw still didn't want to come out, even with a couple taps with a lead hammer. Then as I was flipping it around, checking to see if there might be another screw, a little ball fell out of the retaining screw hole, and voila, the screw slid right out. Just something to keep in mind if you go to disassemble one of these. The vise is in excellent condition, worst part will be straightening the handle.
Last pic is a widget I got at the same sale as the York, made a thread looking for help in figuring out what it is, no luck, thought I'd throw it out here too. Oh yea, you can just make out a little of the hand vise from the same sale too.