Highlighting Patek Philippe’s great tradition of astronomical watches, the Celestial devotes its dial to a rotating chart of the heavenly bodies. At any time, its owner may admire the exact configuration of the nocturnal sky in the northern hemisphere, with the apparent movement of the stars and the phases and orbit of the moon. Two skeletonized hands point to the hours and minutes of mean solar time. An Ellipse, deposited on the underside of the sapphire glass, frames the portion of the sky visible from Geneva and all other cities located at the same latitude.

Watch
Self-winding mechanical movement. 
Caliber : 240 LU CL C. 
Date by hand. 
Hours and minutes of mean solar time. 
Sky chart, phases and orbit of the Moon. 
Time of meridian passage of Sirius and of the moon. 
Black sapphire-crystal disks for sky background and moon phases. 
Transparent sapphire-crystal disk for sky chart and Milky Way.
Dial : Transparent sapphire-crystal disk for sky chart and Milky Way.
Case: Rose Gold. 
Diameter: 44 mm. 
Height: 11.33 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Gemsetting : 38 baguette-cut diamonds : ~4.27 ct. (bezel). 
22 baguette-cut diamonds : ~1.13 ct. (clasp). 
Total of 60 baguette-cut diamonds (~5.4 ct.).
Strap : Alligator strap with rectangular scales, hand-stitched, shiny black. 
Fold-over clasp.