The Grand Complications 6104P-010 represents Patek Philippe's artistic and technical mastery combining astronomical complications displaying celestial mechanics with haute joaillerie gem-setting craftsmanship, derived from the original Celestial reference 5102 introduced in 2002 as the first wristwatch to show the nocturnal sky in real-time rotation with accurate star chart positioning for Northern Hemisphere observers. This Joaillerie variant elevates the already exceptional Celestial complication through factory-set baguette-cut diamonds encircling the bezel totaling significant carat weight, transforming a Grand Complication astronomical watch into a precious jewelry timepiece while maintaining the functional accuracy of the sky chart mechanism rotating once every sidereal day showing constellations and moon phase through patented sapphire disks. The midnight blue dial recreates the night sky visible from Geneva through gold stars and Milky Way representation, appealing to collectors who value both astronomical complications demonstrating celestial mechanics and the artistry of haute joaillerie gem-setting combined with Patek Philippe's legendary finishing standards and mechanical precision. The 44mm case crafted in platinum features polished round bezel set with 32 baguette-cut diamonds totaling approximately 4.73 carats arranged in continuous setting around full circumference, polished case band, stepped lugs with polished surfaces, sapphire crystal, two corrector pushers in case band at 8 o'clock and 10 o'clock positions for adjusting moon phase and sky chart rotation, and transparent sapphire caseback revealing the meticulously finished movement. The midnight blue lacquered dial features center sky chart depicting Northern Hemisphere celestial view as seen from Geneva showing constellations with 279 gold stars of varying sizes representing actual stellar magnitudes creating accurate astronomical representation, outer rotating graduated ring with date scale from 1 to 31, moon phase display at 6 o'clock with three-dimensional gold moon against blue background showing lunar cycle, subsidiary dial at 4 o'clock displaying hours and minutes with gold hands, cardinal points N-S-E-W marked on outer ring, Milky Way depicted through silvered zone across sky chart section, transparent sapphire disks creating depth and dimensional layering effect for celestial display rotating once every 23 hours 56 minutes and 4 seconds matching one sidereal day. Inside beats the self-winding Caliber 240 LU CL C featuring ultra-thin construction, off-center micro-rotor in 22-karat gold, sky chart mechanism with patented sapphire disk system, moon phase accurate to one day's deviation every 122 years, 29 jewels, Gyromax balance wheel, Spiromax balance spring in Silinvar, frequency of 21,600 vibrations per hour, Patek Philippe Seal certification guaranteeing exceptional finishing and precision, approximately 48 hours of power reserve. Hand-stitched alligator leather strap with large square scales secures with platinum fold-over clasp. Reference Number: 6104P-010 Model Family: Grand Complications Movement: Automatic Case Material: Platinum Bracelet Material: Alligator Strap Dial: Blue Celestial Case Dimension: 44mm Year: 2025 Condition: Pre-Owned (Very Good) Box & Papers: Original Box, Original Papers