- Limited edition of 18 pieces.
- Case: Diameter: 47mm.
- Thickness: 25 mm.
- Sapphire apertures on sides.
- 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 proof
- 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.
- 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).
Jacob & Co. Astronomia Tourbillon Sky Yellow Limited Edition 47mm
| النموذج | علم الفلك |
|---|---|
| تاريخ الإصدار | 2024 |
| المواد: | روز جولد |
| الحجم | 47 مم |
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