What a wonderful watch and full package!
I got my 5712, which I really like a lot, because it does not try to look too closely like the mythical 3700! The 3700 cannot be bettered!
A dealer in Munich sold a complete and unpolished 3700 this week within a few hours after putting it up for sale - at a crazy price. They indeed are rare and sought in that condition!
Enjoy your definitive Nautilus in good health!