Patek Philippe Grand Complications Celestial Moon Age Platinum Blue Sky Chart Dial | 6102P-001

Among Patek Philippe's most astronomically complex offerings, the platinum 6102P-001 with its distinctive blue sky chart dial represents the pinnacle of celestial timekeeping within the Grand Complications collection. This 44mm platinum case houses one of the manufacture's most celebrated astronomical complications, displaying the northern hemisphere's night sky as visible from Geneva, complete with moon phases and sidereal time indications. The deep blue dial serves as a canvas for 279 stars, mapped with scientific precision and varying in brightness according to their actual stellar magnitude. Collectors recognize this reference as the "Sky Moon" variant, distinguishing it from its perpetual calendar siblings through its focused dedication to astronomical display.

Key Features & Specifications

• Astronomical Sky Chart Display — Features a rotating disc showing the exact position of stars and constellations as seen from the northern hemisphere, with 279 individual stars plotted according to their actual celestial coordinates and magnitude
• Moon Phase & Moon Age Indication — Precision moon phase display accurate to one day in 122 years, accompanied by a moon age subdial indicating the lunar cycle from new moon to full moon in days
• 44mm Platinum Case Construction — Substantial platinum case measuring 44mm in diameter, featuring polished and brushed surfaces with a solid caseback displaying the southern hemisphere sky chart
• Calibre 240 LU CL C Automatic Movement — Ultra-thin automatic movement with micro-rotor, providing 48-hour power reserve while accommodating the complex astronomical gear trains
• Sidereal Time Function — Secondary time indication based on stellar rather than solar time, essential for astronomical observations and completing the watch's scientific functionality
• Hand-Stitched Alligator Leather Strap — Premium square-scale alligator leather strap in dark blue, secured with a platinum fold-over clasp bearing the Calatrava cross

About This Timepiece

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