Paying tribute to an iconic Grande Complication, Patek Philippe has created a jewelry version of its chronograph with perpetual calendar Reference 5271, enhanced by 80 blue baguette-cut sapphires (5.16 cts). The aesthetic harmony is complemented by the lacquered blue dial with black-gradient rim and the shiny black alligator strap with contrasting blue stitching. The  CH 29-535 PS Q caliber is distinguished by its traditional architecture (manually wound, column wheel, toothed-wheel horizontal clutch), combined with six patented innovations in the chronograph, as well as its exceptionally slim calendar mechanism.
Watch
Manually wound mechanical movement. 
Caliber :  CH 29-535 PS Q.
Chronograph. 
Central chronograph hand. 
Instantaneous 30-minute counter. 
Perpetual Calendar. 
Day, month, leap year and day/night indication by hand. 
Date by hand. 
Moon phases. 
Small seconds.
Dial : Lacquered blue with black-gradient rim, gold applied hour markers.
Case : Platinum. 
Diameter: 41 mm. 
Height: 12.7 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Gemsetting : 58 baguette-cut sapphires: 4.11 cts. (bezel and lugs). 22 baguette-cut sapphires: 1.05 ct. (clasp). Total of 80 baguette-cut sapphires (5.16 cts).
Strap : Alligator leather with square scales, hand-stitched, shiny black. 
Fold-over clasp set with sapphires.
Diameter: 32 mm. 
Thickness: 7 mm. 
Number of parts: 456. 
Jewels: 33. 
Power reserve with the chronograph disengaged: min. 55 hours - max. 65 hours. 
Balance: Gyromax®. 
Frequency: 28,800 semi-oscillations/hour (4 Hz). 
Balance spring: Breguet. 
Hallmark: Patek Philippe Seal.