I would bet that just about every 'dial refinished on a genuine dial plate' is not what it is claimed to be. Why? Because not many genuine dial plates are floating around today like they were 20 or 25 years ago. I used to see old rolex dials (mostly 6694, 1500, 1600 DJ etc) at NAWCC shows for $15 or $20 each and only bought 8 or 10 in all the years I belonged to the NAWCC. They just were not important back then like they are now because you could still buy dials at the friendly rolex AD.
Fast forward to 2000 or so when higher grade 'refinished' dials started showing up, there were not nearly enough 'genuine dial plates' to go around so fakers did what they do best...make fake signed dial plates. Since the genuine signed plates were sometimes roughly signed anyway, the bogus plates will usually pass inspection...except for the wrong sized dial feet posts, shoddy soldering, and notches at 3.
What difference does a dial 'refinished on a genuine dial plate' make compared to 'refinished on a fake dial plate'? None at all unless the rest of the watch is genuine imho. One could claim a refinished dial using a genuine signed dial plate is 100% Ok (I would go along with this), but in reality the same refinishing job on a fake signed dial plate does not make much difference on an otherwise genuine watch (to many) and no difference at all on a fake or Frankenstien watch imho. In order to determine if the dial plate is genuine you would need to be somewhat of a 'backside dial expert' and after all, how many rolex characters will allow some Bozo to r/r their 'refinished dial on a genuine dial plate' (oxymoron!) just to try to tell if the damn plate is genuine to the brand? Not many I bet.
As for the 'genuine dial plate' being original to a particular watch...it would be a real stretch to prove such a claim.
Btw...the rolex purists who will not allow a 'refinished dial on a replica dial plate' on an otherwise genuine watch today would have been dancing in the street 20 years ago for a refinished dial on a fake plate with the quality we have today.
The bottom line (to me anyway) is a genuine watch should have a genuine dial plate if possible and replicas and F-steins do not matter at all. As time goes by and top grade replica cases, dials, bracelets etc can not be distinguished from genuine, the 'genuine dial plate' matter will disappear just like the '100% genuine, never welded or polished case' matter is slowly dissolving now.
Q...If the swiss watch factories could make nearly identical genuine cases by the thousands with the tools available 50 years ago...why can't the Chinese/Taiwanese etc make them now on the super high tech machines they have today for almost $nothing, like cranking out Canal Street Specials?
A...They can, they just don't want to. They could also make dials that are identical to genuine (except for tritium) but they do not want to do this either. But they are very close on both counts.
'dial plate = 'baseplate'