They might have done it back to front, but their reasoning for claiming it being the first divers watch with a rotating bezel was that it must have come out the year before the patent because that’s how everyone did it. Which, apparently, isn’t true. And they have no other evidence.
I like when Perezscope gets his teeth into something.
https://perezcope.com/2023/09/09/debunking-the-fictitious-history-of-the-blancpain-fifty-fathoms/