Eric,
if one accepts your conditions- which are essentially that any variation or difference "could" be original, then there is no answer to your question of authenticity.
You have decided it is original and "repaired", no one can prove to you it is not; neither can anyone prove that it is. Norm has shown original stitching, others agree; you have not shown any evidence of another possibly original holsters with the type stitching on your holster.
The "preponderance" of evidence is that it is not original, based on the stitching- as you well know this would be sufficient in a civil case, but not a criminal one.
So let's stop beating this horse, he has been dead a long time. JMHO