Jason, I may have what you need, I have a few dozen caseless LCD modules...take a picture of both sides of the module,describe each button location(1 oclock, 3 oclock,etc.) and measure module across widest point(either 25 mm/1" or 29mm/1 3/6"and attach to an email to retroleds@aol.com.
Seiko doesn't make their own "guts"(who does?), so you may end up with an LG or a TRW or some other brand. Describe the functions at each contact/button point :D
Model number would help alot.....I may have the entire watch.