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Astronomia Flawless Vivid Yellow Diamond


Introduced in 2018, the Astronomia Flawless continues to impress with its multifaceted meaning behind the new Astronomia's name. "Flawless" not only refers to the watch's impeccable appearance, but it is also the term for the highest grade of diamond clarity according to the Gemological Institute of America's diamond grading scale. For a diamond to be declared flawless, no inclusions or blemishes should be visible under 10x magnification. Flawless is therefore a fitting benchmark for Jacob & Co.'s evolutionary interpretation of the Astronomia collection's signature sapphire case.

The Astronomia Flawless Vivid Yellow Diamond adds a 3.57 ct. Vivid Yellow diamond on top of the amazing Astronomia movement diamond on top of the amazing Astronomia movement.

The Astronomia is the epitome of 21st century ultra-high-end watchmaking and a globally recognized symbol of Jacob & Co.'s 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 Tourbillon represents the very essence of the Astronomia: it is a cinematic sculpture animated by its four-arm movement construction that rotates and floats through the sapphire-bound space inside its spectacular case. Full of unparalleled watchmaking solutions and adorned with exceptional finishing techniques, the Astronomia Tourbillon has earned its reputation as an inimitable icon in the field of haute horlogerie.


The four arms of the Astronomia Tourbillon carry the triple-axis tourbillon timekeeping organ of the watch, the magnesium globe in blue lacquer for a spectacular representation of Planet Earth, the exclusive Jacob-Cut® 1-carat diamond with 288 facets, and the skeletonized time display. This four-arm assembly completes a rotation around the center of the watch and over a spectacular backdrop in 10 minutes.

Another astounding feature of the Astronomia Tourbillon 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.


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 Tourbillon brings this 220+-year-old invention to breathtaking levels of modern refinement and complexity.

The triple-axis tourbillon of the Astronomia Tourbillon is at the forefront of modern watchmaking. The triple-axis tourbillon's delicately decorated cage encapsulates the balance wheel, hairspring, escape wheel and a number of other crucially important components. Characterized by this open-worked cage, this outstanding tourbillon rotates on three axes simultaneously. It is a constellation of superbly finished components that, when assembled and fine-tuned expertly, allows the JCAM10 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 Tourbillon. 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.

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Astronomia Flawless Vivid Yellow Diamond Video

Flawless Vivid Yellow Diamond

The Astronomia Flawless Vivid Yellow Diamond places a 2.2 ct. Jacob-cut Vivid Yellow diamond on top of the amazing Astronomia movement.


The special 288-facet Jacob-Cut Diamond is a feature of the Astronomia collection. There is only one vendor in the world that can produce this patented cut and they are based in Israel. Here are the steps in its creation:

The Jacob-Cut diamond starts out as a rough diamond more than twice the finished stone's size. First, a rough diamond 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 they start to cut the diamond and find an inclusion, the entire piece will be ruined.

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

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 diamond 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 diamond will be cut away, and 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 diamond with 288 facets, more than half of the initial rough diamond will be cut away.

The complexity of cutting the 288 facets by hand and making sure everything is symmetrical and the diamond is absolutely round, is what makes the Jacob & Co. diamond used in the Astronomia collection so special. The Jacob-cut diamond rotates on itself in 30 seconds, while traveling around the dial in 10 minutes.


The globe is made of blue-lacquered magnesium to ensure consistency in weight, as all four satellites have to weigh exactly the same. The globe rotates on itself in 30 seconds, while traveling around the dial in 10 minutes.


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 Tourbillon is driven through an infinitesimal differential system that allows it to always remain always in the proper 12/6 orientation as it rotates together with the movement's four-armed 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.

At a Glance

The stunning Astronomia Flawless case, completely made of sapphire crystal

The famous Astronomia triple-axis tourbillon, 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

A flawless 3.57 ct. Vivid Yellow diamond on top of the amazing Astronomia movement

Patented Differential System

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Technical Specifications


MOVEMENT: Manufacture Jacob&Co. Manual Winding JCAM24; Diameter: 40mm; Height: 17.15mm; Material: Rhodium; Rose Gold Finishes; Sapphire Barrel Bridge; Components: 367; Functions: Hours and Minutes; Power Reserve: 60-Hours; Frequency: 21'600 vib/h (3 Hz); Jewels: 42; 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.

SYSTEM: Vertical Movement with 4 Arms, Full Revolution in 10 min around a Central Axis

• Gravitational Triple Axis Tourbillon, 1st Cage rotating in 60 sec and 2nd Cage in 2.5 min

• 1 Carat Exclusive Jacob cut® Diamond: 288 Facets, rotating on itself in 30 sec • Magnesium Blue Lacquered Globe, rotating on itself in 30 sec;
• Hours and Minutes Dial, Patented Differential Gears System℗ allows to keep the 12/6 O'clock position

• On top of movement: Vivid Yellow Diamond (~3.57 cts)

CASE: Diameter: 51mm; Height: 25.45mm; Material: Case is complete sapphire crystal (3 parts: case center, domed crystal, caseback) with Double Anti-Reflective Treatment; Case Back: Sapphire with Double Anti-Reflective Treatment Silver Metallization; Bows: Winding and Time-Setting via two 18K White Gold bows; Crystal: Unique Domed Sapphire with Double Anti-Reflective Treatment; Water resistance: 30m

DIAL & HANDS: Dial: Titanium; Hands: Blued Jacob&Co designed hands.

STRAP & CLASP: Strap: Alligator; Clasp: 18K White Gold Deployment Buckle.



If you have any questions, queries or comments, please feel free to get in touch and our team will be delighted to help you.

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