Jacob & Co. Astronomia Sky Press Release
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Jacob & Co. Astronomia Sky
Press Release
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JACOB & CO. ASTRONOMIA SKYCELESTIAL PANORAMA GRAVITATIONAL TRIPLE AXIS TOURBILLON
The Triple Axis Tourbillon Goes Sidereal
“As a sailor heading toward the seas driven by the celestial vault, I found my star: the Astronomia Sky,” says Jacob Arabo, founder of Jacob & Co. Just like mankind fascinated since the dawn of time by the observation of the night sky, Jacob & Co. drew its inspiration from the astronomical town clocks, which are true technical and aesthetic masterpieces. In 2014, Jacob & Co had already stunned the watch industry with the launch of the Astronomia Gravitational Triple Axis Tourbillon. This year, it takes the challenge even further with the Astronomia Sky by adding a never-before-seen complication: a sidereal display in three dimensions combined with an oval sky indicator and a 24-hour day and night display. To understand the complexity of this feat, each innovation will be examined individually.
Sidereal Time
Covering the internal surface of the Astronomia’s case, the celestial dial accomplishes a full rotation in one sidereal year –which is the actual time it takes the earth to make one full rotation around the sun in relation to the fixed stars. The blued grade 5 titanium dial features 18K gold stars as well as applied and hand-engraved and zodiac signs.
Oval Sky Indicator
Above this celestial dial is the Oval Sky Indicator, which shows the portion of the stars visible from the Northern Hemisphere. This indicator makes one full rotation in one sidereal day. A sidereal day is how long it takes for the earth to rotate once on its axis: 23.5640916 hours.
Day/Night Indicator
In the center of the satellite axis, a lacquered hand-engraved titanium globe rotates on itself inside a tinted half-domed sapphire, symbolizing night and day.
Satellites Race
Rotating around the watch are the four satellite arms, which rotate around the dial every 20 minutes, so when you look at the watch, it will never appear exactly the same.
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On one of the satellites is the amazing triple axis gravitational tourbillon, which rotates on one axis in 60 seconds, on the second axis every five minutes and around the dial every 20 minutes.
On another satellite is the time (hours and minutes) subdial. Thanks to a clever differential gear system, the time display is always in the correct position while it rotates around the dial, in other words, the 12 is always up.
On the third satellite is the Orbital Second Hand, an open-worked titanium wheel that rotates in 60 seconds with a second hand, and it also rotates around the dial every 20 minutes.
On the fourth and final satellite is the patented “Jacob Cut” red moon, a spherical orange sapphire with 288 facets. This sapphire, the first of its kind in the modern jewelry industry, rotates on its axis every 60 seconds and turns around the dial every 20 minutes.
Optimized Setting
Jacob & Co. found a simple solution to the setting of this complicated timepiece. The Astronomia Sky has two bows and two wheels on the back of the watch, making setting easy. One bow is for setting the time and the day/night indicator (both based on 24-hour solar time), while the other bow is for winding the mechanical movement. One of the wheels is to set the sidereal time, and the other wheel is used to set the oval sky indicator.
Jacob & Co., known for its unique and captivating complications, has done it again with the Astronomia Sky.
About Jacob & Co.
Led by Jacob Arabo, Jacob & Co.’s exquisite timepieces have captivated for over three decades and continue to revolutionize the world of haute horology. Whether challenging the limits of grand complications or pushing the boundaries of artistic beauty, Jacob Arabo’s daring vision of luxury has developed the brand into a symbolic expression of success and individuality. Jacob & Co. demonstrates its extraordinary pedigree that was built on a constant drive to evolve at every turn and gain inspiration from the seemingly impossible.
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TECHNICAL SPECIFICATIONS
Movement: Exclusive Jacob&Co. Manual Winding JCAM11; Diameter: 40mm; Height: 17.15mm; 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 DISPLAYCelestial Dial covering the internal surface of the inside case, representing the celestial vault through zodiac signs. A full rotation in 1 sidereal year1.Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation in 1 sidereal day2 above the celestial vault.Month indication: 12 months on sides of the celestial dial.
DAY AND NIGHT INDICATIONLacquered 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 TOURBILLONRotating 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 INDICATIONRotating on 2 axes; • 1st Axis: in 60 seconds, • 2nd Axis: Central Axe, travelling across the celestial vault in 20 minutesOpen Worked Titanium Wheel and Hand indicating seconds;
HOUR & MINUTE INDICATIONPatented differential systemRotating on a Central Axe, travelling across the celestial vault in 20 minutes;
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THE JACOB CUT RED MOONWeight: 1 carat; 288 Facets Orange Sapphire Patented Jacob CutRotating on 2 axes: • 1st Axis in 60 seconds. • 2nd Axis: Central Axe, travelling across the celestial vault in 20 minutes.
Case: 47mm; Thickness: 25mm; Material: 18K Rose Gold; Sapphire Apertures on Sides; Case Back: 18K Rose Gold; Bows: 18K Rose Gold lift-out Rotating “bows” for Winding, Time-Setting; Two Wheels on Caseback Sides for Synchronization of the Sidereal Time: Celestial Dial and Oval Sky Indicator; Crystal: Unique Domed Sapphire with Anti-Reflective Treatment.
Dial and Hands: 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; Hands: Hand Finished Blue.
Strap & Clasp: Alligator; 18K Rose Gold Folding Buckle.
Remarks: Water resistant to 30m (ISO 2281); 2-year warranty.
Limited Edition: 18 pieces; Individually Numbered Pieces.
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).
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For more information, please visit www.jacobandco.com#jacobandco
For media inquiries please contact:
Jacob & Co. Corporate Office
[email protected]+1.212.719.5887
Europe & Trade Press
[email protected] +41.22.310.6962
Jacob & Co. 7j a c o b a n d c o . c o m
N e w Y o r k 48 East 57 Street, New York, New York +1.212.719.5887G e n e v a Chemin de Plein-Vent 1 ch-1228 Geneva, Switzerland +41.22.310.6962
astronomia sky
360 degree Celestial Sky Panorama
Patented Gravitational Triple Axis Tourbillon; Tridimensional Sidereal Time DisplayManufacture Jacob & Co. JCAM11 Caliber. 47mm 18k Rose Gold Case; Limited Edition 18 pieces
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