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Astronomia Flawless Fancy Yellow Diamond
(RETAIL PRICE: $1,000,000)


The Astronomia is the embodiment of 21st century ultra-high-end watchmaking 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 to becoming an outstanding multidisciplinary engineering accomplishment.

At the center of the Astronomia is an unprecedented four-arm movement. Attached to each arm is a novel complication. Two of the complications have earned patents because of their design and engineering. The other two are original works of art that highlight Jacob & Co.'s skilled craftsmanship. When combined, they contribute to a spectacle of moving objects that rotates and floats inside a spectacular sapphire crystal case.

Introduced in 2018, the Astronomia Flawless was named after the unique case made entirely of sapphire crystal. "Flawless" normally refers to the highest grade of diamond clarity. Thus, the name of this watch is a fitting interpretation for the crystal clear sapphire case of the Astronomia Flawless.

To add to this story, the Astronomia Flawless Fancy Yellow Diamond adds a spectacular 2.88 carat diamond on top of the iconic Astronomia movement.

Jacob Arabo, the founder of Jacob & Co. said the Astronomia was inspired by the universe and all the ideas and wonderment of celestial bodies. Since its introduction in 2014, the stars, the moon and planets take on a new wonderment and meaning with each new piece. Even as the Astronomia story continues, it has already earned its place in the world of haute horlogerie and extreme extravagance.


The groundbreaking Astronomia four-arm vertical movement has proven to be a creative and technical watchmaking achievement. Each arm has a unique complication exclusive to Jacob & Co.: A magnesium and hand-lacquered globe of the earth, a spherical-shaped diamond with 288 facets known as the "Jacob-Cut," a patented triple-axis tourbillon, and a subdial for the hours and minutes with a patented timepiece-differential gear system.

Each pair of opposing arms are perfectly calculated counterweights of one another - a testament to peerless materials engineering and watch movement design. Any variation of the weight would cause the movement to malfunction. Instead, this high complication and all its moving parts run effortlessly for all to see.


The tourbillon was originally invented to provide improved timekeeping performance for a pocket watch. The Astronomia Tourbillon brings this 200-plus-year-old complication to breathtaking levels of modern refinement and complexity.

The triple-axis tourbillon of the Astronomia Tourbillon is at the forefront of modern watchmaking. The delicately decorated cage encapsulates the balance wheel, hairspring, escape wheel and several other important components. Characterized by this openworked cage, this outstanding tourbillon rotates on three axes simultaneously. It is a constellation of superbly finished components that, when expertly assembled and fine-tuned, allows the Astronomia caliber 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 2.5 minutes to complete, while the 3rd axis of rotation is made possible by the 10-minute, four-arm rotating platform of the Astronomia movement. This makes for a bold new way at how tourbillons can function, when engineered with cutting-edge, ultra-modern technologies and timeless horological heritage in mind.

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Astronomia Flawless Fancy Yellow Diamond Video

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Flawless Fancy Yellow Diamond

The Astronomia Flawless Diamond places a yellow diamond on top of the Astronomia movement.


The Jacob Cut is a unique spherical gem exclusive to Jacob & Co. It is a distinctive work of innovation, creativity, and execution.

The Jacob Cut diamond starts out as a much larger rough diamond, up to twice the size as the finished product. The rough is first cut by machine into a spherical shape, near the size of the final diamond. Then the master gem cutter shapes the 288 facets. To be used in the Astronomia Collection, the Jacob Cut diamond must be completely round and weigh exactly as much as the other three satellites (time display, triple-axis tourbillon, magnesium globe). Another challenge is ensuring the precise dimensions of the facets, which is why the cutting process takes at least two weeks of dedicated, painstaking work.

The Jacob-Cut is most recognizable on the Astronomia watch as a diamond that extends from one of the four arms of the vertical Astronomia movement. However, the cut has been applied on colored gemstones and placed in the dial in other ways.


The globe of the earth is made of magnesium coated with hand-painted blue lacquer and completed with rose gold continents. It is done in a way that ensures consistency in weight, as all four satellites must weigh exactly the same. The globe rotates every 30 seconds while traveling around the dial every 10 minutes.

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All of this complicated high watchmaking is visible thanks to the iconic Astronomia Flawless sapphire crystal case, a triumph of engineering and sapphire crystal finishing expertise. The domed sapphire crystal top and curved sides are all polished by hand, treated with an anti-reflective coating, to make sure the artistry is crystal clear.


The time display sub-dial of the Astronomia is driven through a differential system that allows it to always remain level and legible as it rotates with the movement's four-arm platform across the front of the Astronomia. 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.
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At a Glance

The stunning Astronomia Flawless case is completely made of sapphire crystal

A spectacular 2.88 carat diamond on top of the Astronomia movement

The famous Astronomia movement with four satellite arms rotating around the dial in 10 minutes

One carat 288-facet Jacob-cut diamond and magnesium globe, rotating on themselves in 30 seconds

Time display always in the right orientation thanks to a patented Differential System 

Technical Specifications


MOVEMENT: Manufacture Jacob&Co. Manual Winding JCAM16; Diameter: 40mm; Height: 17.15mm; Material: Titanium; Rose Gold Finishes; Sapphire Barrel Bridge; Components: 367; Power Reserve: 60-Hours; Frequency: 21'600 vib/h (3 Hz); Jewels: 42 System: Gravitational Triple Axis Tourbillon; Finishing: Plate and Bridges: Hand Angled and Polished, Flank Draw, Circular Graining, Polished Sink, One Sapphire Bridge; Polished Screws; Barrel: Circular Graining; Pinions: Conical Pinions; 4 Mechanical Ball Bearing Devices; Flat Balance Spring.

FUNCTIONS: Hours, Minutes, Dial Rotating in 20 min on the Central Axis, Patented Differential Gears System; Spherical 288 Facets Exclusive Jacob Cut®White Diamond, Weight: 1 carat; rotating in 60sec on 2 axes; Magnesium Globe Rotating in 60sec on 2 axes; Continents in Rose Gold; Oceans in Blue Lacquered; Gravitational Tourbillon Cage Rotating on 3 axes:
• 1st Axis: in 60sec,
• 2nd Axis: in 5min,
• 3rd Axis: Central Axe in 20min;
On Top: Spherical 288 Facets Exclusive Jacob Cut® Fancy Yellow Diamond, Weight: 2.2 carat; rotating on itself.

CASE: Diameter: 50mm; Thickness: 25.45mm; Material: Sapphire with Double Anti-Reflective Treatment; Case Back: Sapphire with Double Anti-ReflectiveTreatment Silver Metallization; Bows: Winding and Time-Setting via 18K Rose Gold; Crystal: Unique Domed Sapphire with Double Anti-Reflective Treatment.

DIAL & HANDS: Dial: Rose Gold dial; Hands: Hand Finished Blue.

STRAP & CLASP: Strap: Special Rubber: Clasp: Titanium folding buckle.

REMARKS: Water resistant to 30m (ISO 2281); 2-year warranty.


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Jacob & Co

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