It looks like this watch is delivered with 2 different movements.
The 315 and the 324.

The Aquanaut 5167 is only a few months available and only the first seem to have the 315 movements.
For some reason shortly after introduction they changed the movement into a 324.
I guess the 5167 with 315 was only 1, maximum 3 months in production.

This ofcourse makes it a VERY RARE Patek.