Patek Philippe. A Large and Rare 18k Gold Automatic Astronomical Wristwatch with Sky Chart, Phases and Orbit of the Moon Including Time of Meridian Passage of Sirius and the Moon, Original Certificate, Factory SealedSigned Patek Philippe, Genève, Ref. 5102, Celestial Model, Movement No. 3'580'055, Case No. 4'442'051, Manufactured in 2007Cal. 240/165 automatic movement, stamped with the Geneva Seal, 22k gold micro-rotor, 45 jewels, blue sky dial with three superimposed crystals of the northern night sky and its relative meridian passage of Sirius, orbit of the moon, sector for north, south, east and west divisions, outer chapter ring with Roman numerals, large circular case, engraved band with the Calatrava cross, two crowns in the band for time set, sky chart, lunar orbit and moon phases correction, sapphire crystal display screw back, 18k gold Patek Philippe buckle, case, dial, and movement signed43mm diam.