There were several web-pages of folks who were "specialists in antiquing" various guitars and Basses. And there IS one point that might be worth mentioning.
Some of these people who put together fakes, shop around for totally blown or destroyed guitars - primarily so they WOULD have the original hardware. In that case and with some level of workmanship, knowledge of paint / finishing, etc - it can be really tough. When you're talking about a sale of potential $10,000-level, the lengths they go to are amazing.
TTBoMK this most often happens with Fenders simply due to numbers of available junked units & collected parts; but it theoretically could happen with most anything. The really unfortunate thing is that (on rare occasion) it starts out as an innocent hobby and from places like older established music stores or pawn shops that would have access to parts. However it could also generate from an Estate sale, a fire liquidation sale, or genuine forgers / thieves who post little adds in publications offering to buy items "no matter their condition" (fakes happen in MANY formats). Then the serial numbers and hardware ARE genuine, & with some skill; it becomes a serious issue.
People will go to great lengths for the type of money that could potentially generate. Even a few thousand dollars for a pre-EBMM would be worth the effort if the guy had all the hardware from a fire sale and was a dishonest but skilled re-finisher.
While Fender may have a code within a serial number that indicates the original finish / color, etc, that's still no guarantee of authenticity. IMO, if I was going to spend money on ANY antique I would also take the time to go to an appraiser (there are musical instrument appraisers that are certified just like furniture antique dealers from Appraisal Associations), who will issue documentation for a low fee. Those people will go to court w/ you if need be.