Just got my noob v3 back from PB. Gen parts galore. I'm in the same boat as you. Wish the yuki or gen movement would fit.
Getting the rep dwo to match the gen dial date window opening is no easy task. That's the killer for me on my build.
Ive never had any luck with gold plating. They seem to tarnish easily for me. Others have worn them for years with no issue. I guess I drew short straws with the rep gold.
Looks like a Sean case YM to me. Dial and bezel do not look like a wm9. Sel fit looks sean. They were known to have a "ok" sel fitment.
Sean case YM is the most gen like YM available. Better then the wm9s. If you pop off the bezel insert I believe that the Sean bezel was substantially thicker then the thin tin piece wm9 used.