A couple of months before this "Authenticity" BS program was rolled in, I picked up an incredibly mint and untouched one-owner Speedmaster on eBay.
The watch was never opened since it left Bienne 50+ years ago, and the caseback was almost welded shut. (No movement pictures in the listing obviously). It took my watchmaker about 15 minutes and a lot of patience to carefully open the caseback without damaging it... I coudn't help but think what would have happened had this watch would have gotten to the hands of an "Authenticator"....
🤦
Sure enough, a few weeks ago I got my answer when I bought yet another dead mint Speedy on eBay, only to receive the watch with the case all dinged and dented up! (Looks like someone dropped it on the floor...). In order to get a refund from the seller, I had to send it to be re-authenticated on the return trip. I googled the shop by the shipping address I was provided (No store name was given by eBay). Sure enough, looks like your regular "Joe-Schmoe" neighborhood watchmaker shop that specializes in several other low-end brands (Baume & Mercier etc...) not even Omega. I guarantee they wouldn't know how to authenticate a vintage Speedy lume even if it hit them in the head...
This "Authentication" program might be good for modern pieces. But for vintage? No way Jose!