The new Aquanaut was launched around Jun/Jul 2007. It started with 315 movement. But no one know exactly when it shifted to 324 movement. The shift might be gradual. My 5167 was produced in Feb 2008 and it carries the 315 movement. I saw a 5165 produced in Jan 2008 with a 324 movement. This message
In May 2008 I brought this 5980 and I promised not to buy any watches for at least 2 years. Mt wrist is less than 16cm. It still wears comfortably. (But...later, I changed my promise to "not to buy any watches more expensive than 5980 for at least 2 years" )
I don't have a simple answer by just looking at the watch. I will put the watch in the watch winder and set it in clockwise (CW) and wait for a couple of days. If the watch does not stop, the winding should be CW or bidirectional (then I will try it in counterclockwise (CCW), to see if it is bidirec