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Astronomia Sky Rose Gold

Astronomia Sky White Gold

Story

The Astronomia is the epitome of 21st century haute horlogerie and a globally recognized symbol of Jacob & Co watchmaking expertise. A world-first both in the boldness of its unprecedented concept and its entirely mechanical construction, the Astronomia has gone beyond impressive horological achievements and has been regarded as an outstanding multidisciplinary engineering achievement.

The Astronomia Sky introduces new complications of celestial inspiration to Astronomia: a sidereal display, vertical month display, zodiac signs, day and night indication, as well as a celestial panorama, orbital second indication and a Jacob-Cut® diamond Moon have all been added to fully transform the iconic Astronomia. Full of unparalleled watchmaking solutions and adorned with exceptional finishing techniques, the Astronomia Sky is a poetic and singular entity in ultra-high-end watchmaking.

Exclusive Astronomia Caliber

The Astronomia Sky stays true to the original layout of the Astronomia's iconic caliber construction: the entire four-arm assembly of its Exclusive JCAM11 Caliber rotates, a truly unprecedented engineering and watchmaking achievement that is as spectacular, as challenging it is to realize. Its four rotating arms and the complications they carry all float through the space between its front sapphire crystal and blued Titanium celestial dial.

The four arms of the Astronomia Sky carry the gravitational triple-axis tourbillon that is the timekeeping organ of the watch, the orbital, double-axis, vertical seconds indication, an exclusive Jacob-Cut® 1-carat diamond, and a differential-leveled time display. This four-arm assembly completes a rotation around the center of the watch in 20 minutes. Another outstanding feature of the Astronomia Sky is how each pair of opposing arms are perfectly calculated counterweights of one another - a testament to peerless materials engineering and watch movement design. By having equal weights on these opposing arms, its axles are relieved from strain and increased pull, as the movement takes up different orientations in space.

Astronomia Sky Triple Axis Tourbillon

Triple-Axis Tourbillon

Whereas the tourbillon was originally invented to be a single-axis, rotating cage to carry the regulating organ of a mechanical pocket watch for improved timekeeping performance, the Astronomia Sky brings this 224-year-old invention to breathtaking levels of modern refinement and complexity.

The triple-axis tourbillon of the Astronomia Sky is at the forefront of ultra-high-end watchmaking. Its delicately decorated cage encapsulates the balance wheel, hairspring, escape wheel and a number of other crucially important components. Characterized by this openworked cage, this exotic tourbillon rotates on three axes simultaneously. It is a constellation of superbly finished components that, when assembled and fine-tuned expertly, allows the JCAM11 to keep accurate time throughout its 60-hour power reserve.

A full rotation on the 1st axis takes exactly 60 seconds, as a nod towards the traditional single-axis tourbillon. The 2nd axis of rotation requires 5 minutes to complete, while the 3rd axis of rotation is made possible by the 20-minute, four-arm rotating platform of the Astronomia Sky. This makes for a bold new look at how tourbillons can function, when engineered with cutting-edge, ultra-modern technologies and timeless horological heritage in mind.

Astronomia Sky Rose Gold Video

DAY/NIGHT INDICATOR

At the center of the movement, a lacquered hand-engraved titanium globe rotates on itself in 24 hours, inside a tinted half-domed sapphire crystal, showing night and day.

Astronomia Sky Celestial Dial

Celestial Panorama, Sidereal Display & Astronomical Indications

The Astronomia Sky brings a host of uniquely executed astronomical complications into the extremely complex world of Astronomia. Apart from the day-night indication that works as a shield around the globe in the center of the dial, these features are implemented on the Celestial Dial that is spread out behind the four rotating arms.

A view on the celestial vault through zodiac signs can be admired in hues of mesmerizing blue and gold: this delicately patterned dial makes a full rotation in exactly one sidereal year. On the periphery of this indication are the twelve months, turning this into a month display of unprecedented elegance and complexity. Over the blue Celestial Dial the oval sky indication is located: with its moving oval outline it shows the portion of the stars visible from the Northern hemisphere at any given time.

288-FACET JACOB-CUT ORANGE SAPPHIRE

The Jacob-Cut sapphire starts out as a much larger rough sapphire. First, a rough sapphire big enough has to be found, and the purity, clarity, and color has to be of the highest quality both inside and out, and there can be no inclusions. If the gem cutter starts to cut the sapphire and finds an inclusion, the entire piece will be ruined.

Next, the sapphire is cut by machine into a round shape, close in size to the final sapphire.

Then, the gem cutter shapes the stone by hand, cutting each individual facet (of 288). This has to be done slowly and carefully, as the stone has to be perfectly round and symmetrical. The danger is that the stone will become oblong and not round. To be used in the Astronomia Collection, the Jacob-cut sapphire has to be completely round and weigh exactly as much as the other three satellites (time display, triple-axis tourbillon, magnesium globe).

During the process, if the gem cutter puts slightly too much pressure while adding the facets, too much of the sapphire will be cut away, and the ball will end up smaller than the desired diameter. The cutting process takes at least two weeks of dedicated, painstaking work.

To make the final one-carat, Jacob-cut sapphire with 288 facets, more than half of the initial rough sapphire will be cut away.

The complexity of cutting the 288 facets by hand and making sure everything is symmetrical and the sapphire is absolutely round, is what makes the Jacob & Co. sapphire used in the Astronomia collection so special.

Astronomia Sky Case & Crystal

Case & Crystal

The Astronomia Sky's case measures 47 millimeters in diameter and 25 millimeters thick between the highest point of its specially curved front sapphire crystal and the lowest point of its case. Its 18K Rose Gold case holds a single-piece sapphire crystal window around its periphery, allowing for unhindered viewing of the spectacular caliber inside. One's focus on the universe that lives inside the Astronomia Sky is further assisted by the openworked lugs - a minute, yet important detail that drives ones vision towards the center of the timepiece.

Astronomia Sky Dial & Hands

Dial & Hands

The time display sub-dial of the Astronomia Sky is driven through an infinitesimal differential system that allows it to always remain levelled and hence perfectly legible, even as the movement's four-armed platform performs its continuous, 20-minute orbit. The Roman numerals on the skeletonized dial are hand-engraved and filled with black lacquer, while the hand-finished hands appear in gun blue metallic.

diagram

ASTRONOMIA SKY APP

In the past, setting an astronomical watch has been laborious, and often involved making a trip to the watchmaker to set it correctly. To make things easier, Jacob & Co. has created a simple yet ingenious solution to the time setting of this complicated watch. The company created a simple app for smartphones that determines where you are in the world, then guides you through the setting of the watch. The Astronomia Sky has two lift-out bows and two notched wheels on the back of the watch, making time setting very easy for the user. 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 wheel is to set the sidereal time, while the other wheel is to set the oval sky indicator - and you will be guided through the setting process by the app.

AT A GLANCE:

Iconic gravitational triple-axis tourbillon

47mm 18K rose gold and sapphire crystal case, with sapphire crystal back

All four satellites constantly turn around the dial in 20 minutes

288-facet Jacob-cut diamond turning in 60 seconds

Magnesium globe turning in 60 seconds

Unique differential always keeps the time display in the correct 12/6 orientation, no matter where it is the rotation

Celestial Vault showing the constellations of the Northern Hemisphere, making one full rotation in one sidereal year

Oval Sky Indicator showing the constellations overhead at any given time, making one full rotation in one sidereal day

Domed and curved, anti-reflective sapphire crystal

Unique crown-less design; winding and setting lift-out bows on the case back

Specially designed application to make setting simple and easy

Technical Specifications

Item Number: AT110.40.AA.SD.A

Movement: Manufacture 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, Cir- cular 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 north- ern 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 & MINUTE INDICATION

Patented differential system; Rotating on a Central Axe, travelling across the celestial vault in 20 minutes;

THE JACOB CUT ORANGE SAPPHIRE

Weight: 1 carat; 288 Facets Jacob-cut Orange Sapphire Rotating 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 SkyIndicator; Crystal: Unique Domed Sapphire with Anti-Reflective Treatment;Water resistance: 30m (ISO 2281).

Dial: Celestial Dial: Blue Grade 5 Titanium, 18K Gold hand-engraved and applied stars and zodiacal signs; Hour and Minute Subdial: Titanium, HandAngled and Polished, Lacquered Indexes; Differential Gear System; Hands:Hand Finished Blue.

Strap & Clasp: Alligator;18K Rose Gold Folding Buckle.Limited Edition: 18 Pieces; Individually Numbered Pieces.

1One 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).

LIMITED EDITION: 18 pieces
a watch on a table

Technical Specifications

Item Number: AT110.40.AA.AA.A

Movement: Manufacture 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, Cir- cular 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 north- ern 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 & MINUTE INDICATION

Patented diff erential 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


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 SkyIndicator; Crystal: Unique Domed Sapphire with Anti-Reflective Treatment;Water resistance: 30m (ISO 2281).

Dial: Celestial Dial: Blue Grade 5 Titanium, 18K Gold hand-engraved and applied stars and zodiacal signs; Hour and Minute Subdial: Titanium, HandAngled and Polished, Lacquered Indexes; Differential Gear System; Hands:Hand Finished Blue.

Strap & Clasp: Alligator;18K Rose Gold Folding Buckle.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).

LIMITED EDITION: 18 pieces
a watch on a table

Technical Specifications

Item Number: AT110.40.AA.WD.A

Movement: Manufacture 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, Cir- cular 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 north- ern 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 & MINUTE INDICATION

Patented diff erential system; Rotating on a Central Axe, travelling across the celestial vault in 20 minutes;

THE JACOB CUT MOON

Weight: 1 carat; 288 Facets Diamond Patented Jacob Cut

Rotating 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 SkyIndicator; Crystal: Unique Domed Sapphire with Anti-Reflective Treatment;Water resistance: 30m (ISO 2281).

Dial: Celestial Dial: Blue Grade 5 Titanium, 18K Gold hand-engraved and applied stars and zodiacal signs; Hour and Minute Subdial: Titanium, HandAngled and Polished, Lacquered Indexes; Differential Gear System; Hands:Hand Finished Blue.

Strap & Clasp: Alligator;18K Rose Gold Folding Buckle.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).

LIMITED EDITION: 18 pieces

Technical Specifications

ITEM NUMBER: AT110.30.AA.SD.A


Movement: Manufacture 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 DISPLAY
Celestial Dial covering the internal surface of the inside case, representing the celestial vault through zodiac signs
A full rotation in 1 sidereal year1 counter clockwise.
Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation clockwise in 1 sidereal day2 above the celestial vault.
Month indication: 12 months on sides of the celestial dial: indication index at 6 o'clock.


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 & MINUTE INDICATION

Patented differential system; Rotating on a Central Axe, travelling across the celestial vault in 20 minutes;

THE JACOB CUT ORANGE SAPPHIRE

Weight: 1 carat; 288 Facets Jacob-cut Orange Sapphire Rotating 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: Platinum 950; Sapphire Apertures on Sides; Case Back: Platinum 950; Bows: Platinum 950 lift- out Rotating "bows" for Winding, Time-Setting; two Wheel on Caseback Sides for Synchronization of the Sidereal Time: Celestial Dial and Oval Sky Indicator. Crystal: Unique Domed Sapphire with Anti-Reflective Treatment; Water resistance: 30m (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; Hands: Hand Finished Blue.

Strap & Clasp: Alligator; Platinum 950 Folding Buckle . Limited Edition: 18 Pieces; Individually Numbered Pieces.

1 One sidereal year is the time it takes the earth to orbit the sun.

2 Sidereal Day= 23.5640916 hours, it is the time it takes the earth to rotate on its axis (relative to vernal equinox).

LIMITED EDITION: 18 pieces

Technical Specifications

ITEM NUMBER: AT110.60.AA.WD.A


Movement: Manufacture 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 DISPLAY
Celestial Dial covering the internal surface of the inside case, representing the celestial vault through zodiac signs
A full rotation in 1 sidereal year1 counter clockwise.
Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation clockwise in 1 sidereal day2 above the celestial vault.
Month indication: 12 months on sides of the celestial dial: indication index at 6 o'clock.


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 & 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 White Diamond Patented Jacob Cut Rotating 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: Platinum 950; Sapphire Apertures on Sides; Case Back: Platinum 950; Bows: Platinum 950 lift- out Rotating "bows" for Winding, Time-Setting; two Wheel on Caseback Sides for Synchronization of the Sidereal Time: Celestial Dial and Oval Sky Indicator. Crystal: Unique Domed Sapphire with Anti-Reflective Treatment; Water resistance: 30m (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; Hands: Hand Finished Blue.

Strap & Clasp: Alligator; Platinum 950 Folding Buckle . Limited Edition: 18 Pieces; Individually Numbered Pieces.

1 One sidereal year is the time it takes the earth to orbit the sun.

2 Sidereal Day= 23.5640916 hours, it is the time it takes the earth to rotate on its axis (relative to vernal equinox).

LIMITED EDITION: 18 pieces
an image involving indoor table sitting

Technical Specifications

ITEM NUMBER: AT110.31.AA.WD.A

MOVEMENT: Manufacture Jacob&Co. Manual Winding JCAM11; Diameter: 40mm; Height: 17.15mm; Components: 395; Material: Titanium with Black Treatment; 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 year1 counter clockwise.
Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation clockwise in 1 sidereal day2 above the celestial vault.
Month indication: 12 months on sides of the celestial dial: indication index at 6 o'clock.

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 & 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 White Diamond Patented Jacob Cut Rotating 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 Black Gold; Sapphire Apertures on Sides; Case Back: 18K Black Gold; Bows: 18K Black Gold lift-out Rotating "bows" for Winding, Time-Setting; two Wheel on Caseback Sides for Synchronization of the Sidereal Time: Celestial Dial and Oval Sky Indicator. Crystal: Unique Domed Sapphire with Anti-Reflective Treatment; Water resistance: 30m (ISO 2281).

DIAL: Celestial Dial: Black 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. Limited Edition: 18 Pieces; Individually Numbered Pieces.

1 One sidereal year is the time it takes the earth to orbit the sun.

2 Sidereal Day= 23.5640916 hours, it is the time it takes the earth to rotate on its axis (relative to vernal equinox).

LIMITED EDITION: 18 pieces
a close up of a bowl

Technical Specifications

Item Number: AT113.40.AA.AA.ABALA

Movement: Caliber: Manufacture Jacob&Co. Manual Winding JCAM41; Diameter: 42mm; Height: 21.7mm; Components: 502; Material: Titanium; Jewels: 67; System: Triple Axis Tourbillon; 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 year1.

1 One sidereal year is the time it takes the earth to orbit the sun.

2 Sidereal Day= 23.5640916 hours, it is the time it takes the earth to rotate on its axis (relative to vernal equinox).

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 INDICATION

Lacquered hand-engraved titanium globe, rotating on itself in 24 hours, inside a tinted half-domed sapphire, symbolizing night and day.

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.

SATELLITE AND MARS ANIMATION

Rotating on 2 axes:

• 1st Axis: in 60 seconds,

• 2nd Axis: Central Axe, travelling across the celestial vault in 20 minutes

HOUR & MINUTE INDICATION

Patented differential system rotating on a Central Axe, travelling across the celestial vault in 20 minutes;

THE JACOB CUT MOON

288 Facets Diamond Patented Jacob Cut (1ct.) rotating on itself in 60 seconds.

Case: Diameter: 47mm; Thickness: 25mm; Material: 18K Rose Gold; Sapphire; Case Back: 18K Rose Gold; Bows: 18K Rose Gold lift-out Rotating "bows" for Winding, Time-Setting; two Wheel on Caseback Sides for Synchronization of the Sidereal Time: Celestial Dial and Oval Sky Indicator. Crystal: Unique Domed Sapphire with Anti-Reflective Treatment; Water resistance: 30m (3atm).

Dial & 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: Blued Jacob&Co designed hands

Strap & Clasp: Alligator; 18K Rose Gold Folding Buckle.

Limited Edition: 18 pieces

Variants

Astronomia Sky Rose Gold
Astronomia Sky Rose Gold
Astronomia Sky Yellow Sapphire
Astronomia Sky Yellow Sapphire
Astronomia Sky White Diamond
Astronomia Sky White Diamond
Astronomia Sky Platinum 950
Astronomia Sky Platinum 950
Astronomia Sky Platinum
Astronomia Sky Platinum
Astronomia Sky Black
Astronomia Sky Black
Astronomia Sky Sapphire Mars
Astronomia Sky Sapphire Mars
Featured patents
Point
Point
Point

Patents

Overview
Timepiece-Differential Gear System
Tourbillon Mechanism
Timepiece With Day & Night Visualization
The Astronomia Sky introduces new complications of celestial inspiration to Astronomia: a sidereal display, vertical month display, zodiac signs, day and night indication, as well as a celestial panorama, orbital second indication and a Jacob-Cut® diamond Moon have all been added to fully transform the iconic Astronomia.
This patent covers the way Jacob & Co. makes sure that the hour and minute display always stay in the right orientation so the time is easily read. In fact, since the display is always moving clockwise, the display moves slightly counter-clockwise, making sure 12 o'clock is always in the correct position.
In addition, a patent covers the way the Astronomia achieves the triple-axis tourbillon. Two axes are within the tourbillon itself, while the third axis is when the tourbillon rotates around the dial in 10 minutes.
Jacob & Co. has a patent for the Day/Night indicator, which includes a globe that represents the earth and a half-sphere smoked sapphire crystal which makes one full rotation in 24 hours. The part of the globe covered by the smoked sapphire crystal represents the night, while the uncovered portion of the globe represents the day.
Jacob & Co

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