Description
Limited edition of 18 pieces.
Case:
Diameter: 47mm.
Thickness: 25 mm.
Material: 18k rose gold.
Sapphire apertures on sides.
Case back: 18k rose gold.
Bows: 18k rose gold lift-out rotating “bows” for winding and time-setting.
Two wheels on case back side for synchronization of the sidereal time: celestial dial and oval sky indicator.
Crystal: unique domed sapphire with anti-reflective treatment.
Water resistance: 30 meters (ISO 2281).
Dial:
Celestial dial: blue grade 5 titanium, 18k gold hand-engraved and applied stars and zodiacal signs.
Hour and minute subdial: titanium, hand-angled and polished, lacquered indexes.
Differential gear system.
Hand-finished blue.
Movement:
Manufacture Jacob & Co. manual winding JCAM11.
Diameter: 40 mm.
Height: 17.15 mm.
Components: 395.
Material: Titanium.
Jewels: 42.
System: triple axis gravitational tourbillon.
Finishing: plate and bridges: hand angled and polished, flank draw, circular graining, polished sink.
Polished screws.
Power reserve: 60 hours.
Frequency: 21’600 vib/h (3 Hz).
Functions:
Sidereal display.
Celestial dial covering the internal surface of the inside case, representing the celestial vault through zodiac signs.
A full rotation in 1 sidereal year.
Oval sky indication: showing the portion of the stars visible from the northern hemisphere, a full rotation in 1 sidereal day above the celestial vault.
Month indication: 12 months on sides of the celestial dial.
Day and night indication:
Lacquered hand-engraved titanium globe, rotating on 2 axes:
1st axis: a full rotation on itself in 24 hours.
2nd axis: central axe, travelling across the celestial vault in 20 minutes; inside a tinted half-domed sapphire, symbolizing night and day.
Gravitational triple axis tourbillon:
Rotating on 3 axes:
1st axis: in 60 seconds, 2nd axis: in 5 minutes, 3rd axis: central axe, travelling across the celestial vault in 20 minutes.
Orbital second indication:
Rotating on 2 axes:
1st axis: in 60 seconds, 2nd axis: central axe, travelling across the celestial vault in 20 minutes.
Open worked titanium wheel and hand indicating seconds;
Hour and minute indication:
Patented differential system.
Rotating on a central axe, travelling across the celestial vault in 20 minutes.
The Jacob cut moon:
Weight: 1 carat.
288 facets yellow sapphire patented Jacob cut.
Rotating on 2 axes:
1st axis in 60 seconds.
2nd axis: central axe, travelling across the celestial vault in 20 minutes.
Strap and clasp:
Alligator leather.
18k rose gold folding buckle.
1 One sidereal year is the time it takes the earth to orbit the sun with respect to the fixed stars.
2 Sidereal day= 23.5640916 hours, it is the time it takes the earth to rotate on its axis (relative to vernal equinox).
