Vintage Prentice Vise

[gutpiler]

So I’ve finally gotten around to tearing this old vise apart for restoration. If anyone can take a look at the pic and let me know how the screw comes out of the jaw on this old device so I can get to all the hard to reach parts to clean it would be much appreciate it.
Just FYI I have looked. There is no type of cotter pin or anything like that. It almost looks as if the big washer is pressed fit on there.

 

[Maui]

If you rotate the main screw enough you should be able to see a set screw that secures the round collar in place behind the washer that you mentioned. Loosen the set screw and move the collar and washer out of the way.

 

[gutpiler]

You are correct…the rust was so even it didn’t look like there was one until I used my dremel and it revealed it so thanks!