In 2005, Patek Philippe launched the first Nautilus watch with three complications: the Ref. 3712/1A with power-reserve indicator, moon phase, and analog date.
This model (reference 3712/1A-001) features a 42mm diameter stainless steel case and a “black to dark blue” shade dial with horizontal relief pattern. It is equipped with the automatic Calibre 240. Fitted with a 22 carat gold mini rotor and stamped with the prestigious Geneva seal, this movement can be admired through the sapphire crystal case back.
This Nautilus watch displays hours and minutes with centrally placed baton-shaped hands. The entirely redesigned dial also incorporates a small-seconds counter, a power reserve indicator and a sub-dial for displaying the date and moonphase.
Positioned near 10th and 11th hour marking indexes, the power reserve display reminds the wearer regarding the energy left (maximum 48 hours when fully wound). Its scale also features three red dots for indicating low power reserve (less than 12 hours).
The watch does not feature 4th and 5th hour marker indexes because that area is occupied by the small seconds dial. Another sundial positioned on the left lower part of the dial incorporates a moon-phase display and a pointer hand for indicating date of the month.
Topped with a sapphire crystal case back, this timepiece offers a water resistance of 60 meters.
When it was introduced, reference 3712/1A was the most complicated Nautilus watch. In 2006, Patek Philippe discontinued the production of Nautilus 3712/1A.
Model: Patek Philippe Nautilus 3712/1A
Mechanical ultra-thin automatic Calibre 240
22-carat gold mini-rotor
Power reserve: 48 hours
Hours, minutes, small seconds
Pointer-type date display
Stainless steel case
Case diameter: 42mm
Case thickness: 8.7mm
Stainless steel bezel with vertical fine-brushed finish
Sapphire crystal case back
Water-resistant to 60 m
Shades tones from black to dark blue
Stamped horizontal relief motif
White gold baton-type hour markers and hands with luminescent coating
Integrated stainless steel bracelet with folding clasp