Representing a combination of two popular Patek Philippe complications, the self-winding flyback chronograph with Annual Calendar, Reference 5905, comes in a new rose gold version with a sunburst blue dial – a modern and elegant color accentuating the timeless style of this flagship model. The patented Annual Calendar automatically takes into account 30- and 31-day months, thus requiring only one correction per year, at the end of February.
The rose gold case is distinguished by its sophisticated construction, with a concave bezel and hollowed flanks.

Watch
Self-winding mechanical movement. 
Caliber: CH 28-520 QA 24H. 
Flyback chronograph. 
Central chronograph hand. 
60-minute counter. 
Annual Calendar. 
Day, date, month and day/night indication displayed in apertures.
Dial : Sunburst blue with gold applied faceted baton-style hour markers.
Case : Rose gold. 
Diameter: 42 mm. 
Height: 14.03 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Strap : Alligator leather with square scales, hand-stitched, shiny dark blue. 
Prong buckle.
Diameter: 33 mm. 
Thickness: 7.68 mm. 
Number of parts: 402. 
Jewels: 37. 
Power reserve: min. 45 hours - max. 55 hours. 
Winding rotor: 21K gold central rotor. 
Balance: Gyromax®. 
Frequency: 28,800 semi-oscillations/hour (4 Hz). 
Balance spring: Spiromax®. 
Hallmark: Patek Philippe Seal.