We have been collecting for over 25 years, have handled more than a thousand Red Sox bats, and looked at probably hundreds of more in auctions and online. At the time we started, there was no such thing as photo matching or video matching and of course no MLB authentication.
The hobby has lurched into the present and now you can screen shot from MLB HD and scour Getty images to photo match bats. But we also very much enjoy the more traditional discussions of authentication that revolve around player use characteristics, trying to determine whether a bat is authentic by studying how a player prepared his bats.
Recently, we have encountered discussions that suggest a "players handwriting" is reflected by the numbers on the knobs, and some limited suggestion that bats without knob numbers written a certain way were "fake" or "fraudulent." Player characteristics are a vital part of authentication, especially for the very valuable high end bat. One might not buy a bat that does not have the typical player characteristics, but this does not necessarily mean the bat is fake or fraudulent. Further, the modern bat faker is likely bright enough to research player characteristics, (yes this actually happens, but that is a story for a different day).
Why choose Boggs for this discussion? Well he is one of our favorite Red Sox players, his game used bats have always been in high demand and we have seen extensive discussion by collectors and authenticators in the hobby about his habits and the way that numbers were written on the knobs of his bats. A review of Getty Images is replete with pictures that show his typical Red Sox knob numbering like the below: