If you use SCD, or Beckett, or the Registry checklist for your master set ( which is what I do) you at least have a finite parameter. If all variants, listed or not, are included in what one considers to constitute a master set, then no master set will ever be complete. It may only matter from a Registry standpoint since for the rest of us we can always define a master set anyway we want
Ted--- I would think if you can get PSA to grade it with some special designation and add it to their Registry checklist, it would not only be part of the definition used by many or most for inclusion in master sets, but also a lot more valuable
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I mentioned that I have a 52 Campos with a portion of the front top border missing, and that card ( not mine) was written up and pictured in an SCD article. Yet it is still not included in any master lists I know about , and for that reason just another oddity without much recognition or value...except to me and whoever has one