Patek Philippe Celestial Sky Chart Grand Complication 6102R 18k Rose Gold

More about Celestial Sky Chart Grand Complication 6102R 18k Rose Gold

This is an 18k rose gold Patek Philippe Celestial Sky Chart Grand Complication 6102R-001. It has an alligator leather strap with the original 18k rose gold deployant clasp and a scratch resistant sapphire crystal. There are two crowns; the one at 2 o'clock winds the watch and adjusts the time, and the crown at 4 o'clock adjusts the sky, lunar orbit and moon phases. It has a screw down exhibition sapphire display case back, and the 44mm diameter solid three-body case, gently curved lugs, and stepped concave bezel, are polished. The black dial and sky chart have white star constellations and a superimposed compass comprised of three crystal disks, with applied white directions, and skeletonized white feuille hands. There is an inner white date-ring with an silver hand with a red crescent indicator, and there is an aperture for the moon phases. It has the orbit of the moon as well as the time of the meridian passage of Sirius and the Moon, which was designed by the Patek Philippe engineers who used sophisticated computerization to produce the single precise ratio out of 25 trillion ratio combinations. The accuracy is astounding: The lunar day is accurate to 0.05 seconds per day, 18.385 seconds per year, or 30 minutes and 38.5 seconds per century. The sidereal day is accurate to 0.088 seconds per sidereal day, 32,139 seconds per year, or 53 minutes and 33.9 seconds per century. The moon phase is accurate to 6.51 seconds per lunation. It's water resistant to 30 meters, and there is a 48-hour power reserve at full winding. The 10.58mm thick case, dial, and movement are all signed. This Patek Philippe Celestial Sky Chart Grand Complication 6102R-001 has a mechanical automatic self-winding Patek Philippe caliber 240 LU CL C movement. It's rhodium-plated with fausses cotes embellishment, and it's stamped with the Seal of Geneva quality mark. It's constructed with 45 jewels, 301 components, 12 bridges, and an anti-shock device. It includes a straight-line lever escapement, a Gyromax balance that's adjusted to heat, cold, isochronism and 5 positions, and a self-compensating free-sprung flat balance spring. It has a Spiromax balance spring, a 22K gold off-center mini-rotor, and the mechanism oscillates at a frequency of 21,600 vph (3 Hz).

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