E acho que é isso mesmo, vejam:
"One of the most iconic watch designs ever, the Luminor from Panerai, is famous for its patented crown guard, protecting the crown from hits and bumps while submersed. Pita has taken the concept even further and done away with the crown altogether. Instead, the time is set (and the watch is wound, although the movement is automatic) by screwing the actual caseback of the watch. This allows the Oceana to be set and wound deeply underwater, a rather unique feature for a mechanical watch (enough so to warrant its own two patents, the Pita-TSM or Time Setting Mechanism, and the Pita-RT or Remote Transmission). How does it work more exactly? Well, it’s a bit complicated (yet very elegant): the disk sets the time without actually directly “communicating” with the movement (this constitutes the Remote Transmission), while the usage of certain materials, systems and magnetism that works on top of the Time Setting Mechanism that separates the movement from the remontoire subsystem. Yeah, I barely understand either."