I am no rolex expert but todays dials of all sorts not just rolex are generaly pad printed, which means that an even layer of lume is layed on by machine over the whole area to be lumed pushed through a thin gause, in an old dial that had been hand lumed the lume will be placed bit by bit in the center of the area to be lumed and then spread out to cover the area, more would be in the middle because of the the miniscus efect of the liquid carrying the lume compound. I have seen old dials where the lume has started to flake and turn to dust like you say. And generaly older dials do look more 3D particualy if they have been relumed at some point.
you can always buy with asian and have it swapped for a swiss movement or do the swap your self, it is not that hard, getting a gen dial will be more difficult i think,
Have a look at the $98 vintage subs and Seadwellers that Josh is offering I have modded about 5 so far and bang for buck they are well up there. Gen like construction and with a slow beat Asian as standard. Add a gen crown and tube and a few mods and you have a watch not far off modded mbw area and I thing the only thing I would add after I had done my normal mods is a slow beat Swiss movement
The only major flaw is that the cases have short stubby crown guards. I have got round this by fitting a gen crown and lowering the crown seat half a mm
it is a swiss large calibre stem wound movement, i done recognise it enough to give it as name, but if you are thinking it is an angulus then i dont think it is,
Edit not alarm but twin spring , depending on the movement size it may still make a nice watch movement
how about the mag on this one
look at the bevel of the date window
And i would say that is a gen i found it here http://rolexblog.blogspot.com/2010_03_01_archive.html