I appreciate the quote, and if I'd bought the bass believing it to be all original then heaven knows I'd be miserable now...
I could bore you to death with what I know about Fender decals, mainly gained from personal experience, but this Talkbass thread is pretty accurate for reference https://www.talkbass.com/threads/vintage-fender-decals-who-really-knows-the-facts.902851/
N.B. The only amendment that I would make/suggest is that I have seen legit 1962-67 JB decals with the 168,083 DES number rather than 187,001. So, this shouldn't inherently suggest a fake, but it needs to be considered in line with all of the other aspects.