Reported ...
eBay authenticity is bs, don't trust that. A German journalist investigated it and reconstructed the path of the watch via tracking information and time stamps. The to-be-authenticated watch was sent to the "licensed authenticator" which was a subcontractor of eBay's authentication partner.
The watch arrived at there on November 4th at 10:21 a.m. and was handed over for further shipping at 1:01 p.m. In the intervening 2:40 hours, the authenticity was checked, the data was recorded, an individual certificate was created and the watch was securely packaged
(the so-called authentication process consisting in checking "Dozens of set checkpoints").
It turns out that the subcontractor of eBay's partner is a textile trading company that has a logistics company among its subsidiaries, and that's where the package was sent. So they have professional watchmakers in a logistics company?
Iirc the journalist then even called there and people were very evasive or didn't even know exactly what he wanted ("what watches???"), meaning they had no clue about any "authentication", and after some hesitancy and some "please hold the line" he was asked to please ask eBay directly.
That last phone call was similar to the previous one, half answers, everything is ok, the watch is on its way, no worries.
Don't trust that BS.