Patek Philippe reinterprets the perpetual calendar with retrograde date hand in a new white gold version exuding an original, contemporary style, featuring a dial in gray metallized sapphire crystal revealing the watch’s mechanical heart. The retrograde date as well as the aperture frames of the day (at 9 o’clock), leap-year cycle (at 12 o’clock) month (at 3 o’clock) and moon phases (at 6 o’clock) are underlined by a gray electroplated outline. The bezel and the caseback are enhanced by the famous hobnail pattern, one of the finest emblems of Patek Philippe style.

Watch
Self-winding mechanical movement. 
Caliber : 26-330 S QR. 
Perpetual calendar with retrograde date hand. 
Day, month and leap year in apertures. 
Moon phases. 
Sweep seconds.
Dial : Sapphire crystal with gray metallization and black-gradient rim, white gold applied faceted baton-style hour markers with white luminescent coating.
Case : White gold. 
Bezel and case back guilloched with hobnail pattern. 
Diameter: 39.5 mm. 
Thickness: 11.49 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Strap : Composite material, fabric pattern, black. White gold patented triple-blade fold-over clasp.
Diameter: 28 mm. 
Thickness: 5.36 mm. 
Number of parts: 368. 
Winding rotor: 21K gold central rotor. 
Frequency: 28,800 semi-oscillations/hour (4 Hz). 
Power reserve: min. 35 hours - max. 45 hours.