A new self-winding perpetual calendar has been added to the Patek Philippe collection. It comes in a Calatrava case with beautifully scalloped lugs and applied Breguet numerals. The yellow- and rosegold models feature ivory lacquered dials with recessed counters. The white-gold version has a blue sunburst dial. The watches come with a sapphire crystal case back and an interchangeable solid-gold back.

Watch
Ultra-thin mechanical self-winding movement. 
Caliber : 240 Q. 
Day, date, month, leap year and 24-hour indication by hands.
Dial : Ivory lacquered, gold applied Breguet numerals.
Case : Rose gold. 
Case diameter: 39 mm. 
Height: 9.71 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Strap : Alligator strap with square scales, hand-stitched, shiny dark chestnut. 
Fold-over clasp.
Perpetual calendar. 
Diameter: 27.5 mm. 
Thickness: 3.88 mm. 
Number of parts: 275. 
Bridges: 8. 
Jewels: 27. 
Winding rotor: 22K gold off-center minirotor. 
Frequency: 21’600 semi-oscillations/hour (3 Hz). 
Power reserve: min. 38 hours, max. 48 hours. 
Balance: Gyromax®. 
Balance spring: Spiromax®. 
Hallmark: Patek Philippe Seal.