Patek Philippe 5951P-013

 5951P-013> Men Grand Complications
Watch:

    Split-seconds monopusher chronograph and perpetual calendar
    60-minute counter
    Day, month, leap year and day/night display in apertures
    Date by hand
    Moon phases
    Seconds subdial
    Dial: black lacquered, applied gold numerals
    18K gold dial plate
    Strap: alligator with square scales, hand-stitched, shiny black
    Prong buckle
    Sunburst ring frame with decorative gold-filled engravings
    Water resistant to 30 m
    Platinum
    Case dimensions: 37 x 45 mm
    Interchangeable full back and sapphire-crystal case back

Caliber:

    Mechanical manually wound movement
    Caliber CHR 27-525 PS Q
    Split-Seconds chronograph and perpetual calendar
    60-minute counter
    Seconds sub-dial
    Day, month, day/night indication and leap year in apertures
    Date by hand
    Moon phases
    Diameter: 27.3 mm
    Height: 7.3 mm
    Jewels: 27
    Bridges: 12
    Parts: 400
    Balance: Gyromax®
    Vibrations/hour: 21 600 (3 Hz)
    Power reserve: With the chronograph disengaged: min. 38 hours - max. 48 hours
    Hallmark: Patek Philippe Seal