The patented annual calendar was launched in 1996 and has been a success story for the past 20 years. Indicating the day of the week, the date and the month, and requiring correction only once a year, this ingenious mechanism has emerged as one of Patek Philippe’s flagship models. It offers a choice of different displays and nuances of style, always combining elegant lines, noble materials and lavish attention to finish.
Watch
Self-winding mechanical movement. 
Caliber : 26-330 S QA LU.
Annual Calendar. 
Day and month by hands. 
Date in an aperture. 
Center sweep second hand.
Dial : White Balinese mother-of-pearl dial, gold applied numerals.
Case :White gold. 
Diameter: 38 mm. 
Height: 11 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Gemsetting : Case set with 347 diamonds (~2.65 ct). 
Crown set with 14 diamonds (~0.06 ct). 
Prong buckle set with 27diamonds (~0.21 ct).
Strap : Shiny alligator with square scales, hand-stitched, pale gray. 
Prong buckle.
Moon phases. 
Diameter: 32 mm. 
Thickness: 5.32 mm. 
Number of parts: 319. 
Jewels: 34. Winding rotor: 21K gold central rotor. 
Frequency: 28,800 semi-oscillations/hour (4 Hz). 
Power reserve: min. 35 hours - max. 45 hours. 
Balance: Gyromax®. 
Balance spring: Spiromax®. 
Hallmark: Patek Philippe Seal.