Patek Philippe Sky Moon 5102

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Sky Moon Ref. 5102 is an astronomical watch by Patek Philippe.

This extravagant luxury watch with self-winding movement shows a detailed view of the northern night sky in its uniform rotation, the angular motion of the moon and the moon phase, while a golden ellipse frames that part of the sky, which can be seen above the city of Geneva. On the 12-hour scale the hours and minutes for mean solar time are displayed at the periphery.

The movement consists of 301 components and has as a basis the same mechanism which was originally developed by Patek Philippe for the pocket watch Star Calibre 2000 and then was further miniaturized for the model Sky Moon Tourbillon.

Patek Philippe won the "Aiguille d'Or" Grand Prix at the Grand Prix d'Horlogerie de Genève for the Ref. 5102 Ciel Lune in November, 2002.

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Movement:

Self-winding manufacture movement Calibre 240 CL LU (240/165), 21,600 A/h
Microrotor in 22ct gold, unidirectional winding
45 jewels
Gyromax balance
Breguet hairspring
Stud: movable
Geneva Seal
301 components
Power reserve: ca. 48 hours

Case:

18ct white gold, middle section with decoration of half Calatrava Crosses
D 43.1 mm, H 9.78 mm
Sapphire crystal
Sapphire crystal caseback
Waterproof to 30 m

Dial:

Three metallized sapphire crystal discs
Sapphire cover glass with metallized Roman numerals from I to XII on the inside
Elliptical contour as limiting of the part of the sky visible from Geneva
Hours and minutes hands: skeletonized Feuille hands, gold, white lacquered

Functions:

Hours, Minutes of mean solar time
Star map, time of meridian passage of Sirius
Time of meridian passage of the moon
Angular movement of the moon and moon phases

Bracelet:

Hand-sewn crocodile leather
18 mm tang-type buckle in 18ct white gold