Stay away from those 4205's. They have indirect second hands and every single one I owned, restored, whatever, stuttered. I spent countless hours on those and could never get rid of the stutter. Finally, sold ALL my 4205 parts (3 full bins), new and used parts, 4 complete watches, and many other assorted parts on eBay. I will never do another 4205.
Seiko made a mid size diver, same size as the 4205 with a 7S26 movement...a million times better. Or, go for the 2205 high beat. Much harder to find, but a nice movement.
All these divers are mid size 7S26 or 2205.