I hope you understood from the photos that the way the original 3646 was made is COMPLETELY different than any modern watch rep or gen.
The bezel is screwing in the caseback and the case is just the surround piece. It's amazing !!
The guy who made the case has not been accused of building a fake because he is not. There wouldn't be any Panerai markings anywhere and with a Cali dial it will be a proper homage.