Patek Philippe Nautilus Moon Phase 3712
This is the single-year moon phase version of the original Nautilus from the first generation of the Nautilus family.
Introduced in 2005, the Nautilus Ref. 3712 was the first real complicated Nautilus. It includes a power reserve indicator inside the 11:00 position on the dial like the 3710/1A but adds a subdial with date pointer and moon phase. This watch uses the Cal. 240 PS automatic movement with a micro rotor and is the first Nautilus model to include a sapphire crystal on the back so the movement can be viewed.