Its a good starting position to examine paperwork, but even with documentation some of it been faked there are some many blanks around that are now tied to watches and I would suggest its been going on for years, dials may have been swopped. So we may have reliability issues unless we find lots of original fully papered first owner watches.
I'm sure that we will find exceptions to the norm in every theory as I believe things were more relaxed back then compared with today, product liability was in its infancy.....remember the Army officer who sued Rolex USA over radiation exposure from the GMT bezel. Records were hand written or typed therefore potentially more prone to error etc.
The only certain way to tell IMHO is test the lumi material in a lab.