What separates a Gen from a Franken is provenance. Although it might pass muster at an RSC, I don't personally know the detailed provenance of the key components (case/dial) that can be traced back to the original watch. Provenance does not need to be service papers, could just be a story about what happened over the years.
You could have a watch today where every single component was replaced with service parts (even the case), and would still be considered gen because the owner knows the provenance.
In my case, I personally consider it a franken. RSC would consider it a gen, and from this point on, now has a documented provenance and considered by any future owner as being nothing but gen.