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Astronomia Solar Planets

Astronomia Solar Planets


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. Re-engineered from the ground up, the Astronomia Solar is the most compact in our peerless collection of Astronomia calibers.

Despite its close-packed design, the Astronomia Solar Planets displays the precious planets of our Solar System as cabochon-cut precious stone half-spheres, placed on a rotating aventurine base. Its three main arms carry the differential-driven, self-leveling time display, the magnesium globe in hand-painted blue for a spectacular representation of Planet Earth, the one-minute flying tourbillon regulating organ and a Jacob-Cut®, 288-facet, 1.5ct Citrine stone in its center to represent our Sun. The Astronomia Solar Planets makes for a beautifully artistic, highly refined and fully mechanical recreation of our solar system, to be appreciated like it has never been done before.

Exclusive Astronomia Caliber

The Exclusive JCAM19 caliber of the Astronomia Solar Planets stands out from the exquisite range of Astronomia calibers by being the most compact reiteration of the original, allowing for yet smaller case dimensions as well as new-found proportions. Composed of 447 components, all finished to the highest standards of haute horlogerie, the Astronomia Solar Planets features two rotating platforms. One comprises the three main arms of the caliber, the other the aventurine Skylayer that serves as a spectacular backdrop.

The three arms of the Astronomia Solar Planets carry the one-minute flying tourbillon that is the timekeeping organ of the watch, the blue magnesium globe and a differential-leveled time display. This three-arm assembly completes a rotation around the center of the watch in 10 minutes, while carrying a Jacob-Cut® Citrine stone on its very center. Another outstanding feature of the Astronomia Solar Planets is how it simultaneously drives the aventurine Skylayer and its 7 cabochon-cut precious stone planets in a counterclockwise direction to add further animation and complexity to this unique take on celestial watchmaking.

Astronomia Solar Planets Rotating Planet Display

Rotating Planet Display

The Astronomia Solar Planets brings a host of beautifully executed, astronomically inspired details to the world of Astronomia. A view on the celestial vault can be admired in Aventurine's mesmerizing, glittering blue: it is this rotating disc that carries 7 cabochon-cut precious stone half-sphere planets: White Granite for Mercury, Rhodonite for Venus, Red Jasper for Mars, Pietersite for Jupiter, Tiger Eye for Saturn with 18K Rose Gold appliques for the rings, Blue Calcite for Uranus and Lapis Lazuli for Neptune. This makes for a unique coming together of gem-cutting prowess and ultra-high-end watchmaking, as can only ever be experienced in a Jacob & Co creation.

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Astronomia Solar Planets Video

Astronomia Solar Planets Flying Tourbillon

Flying Tourbillon

Whereas the tourbillon was originally invented to be a single-axis, rotating cage secured from above as well as below to carry the regulating organ of a mechanical pocket watch for improved timekeeping performance, the Astronomia Solar Planets presents this 224-year-old invention in a yet more spectacular way.

The one-minute flying tourbillon of the Astronomia Solar Planets features a delicately decorated cage that encapsulates the balance wheel, hairspring, escape wheel and a number of other crucially important components. This openworked, rose gold cage not only features the J&Co logo in its architecture, but is only secured from underneath, allowing for an unobstructed and full view at the ultimate refinement of its detailing and operation. It is a constellation of superbly finished components that, when assembled and fine-tuned expertly, allows the JCAM19 to keep accurate time throughout its 48-hour power reserve.

Astronomia Solar Planets Case & Crystal

Case & Crystal

The Astronomia Solar Planets' case measures 44.5 millimeters in diameter and 21 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 and precious stones inside. One's focus on the universe that lives inside the Astronomia Solar Planets is further assisted by the openworked lugs - a minute, yet important detail that drives ones vision towards the center of the timepiece.

Astronomia Solar Planets Dial & Hands

Dial & Hands

The time display sub-dial of the Astronomia Solar Planets 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, 10-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.


The Jacob & Co. flying tourbillon, Zodiac Sign time display, and hand-painted magnesium globe make one full revolution of the dial in 10 minutes, rotating clockwise

The Sun is represented by a yellow 288-facet Jacob-cut Sapphire (≈ 1.5 cts)

The dial holding the eight planets makes one revolution counter-clockwise, in 10 minutes

The eight planets are represented by half spheres of semi-precious stones: White Granite for Mercury, Rhodonite for Venus, Red Jasper for Mars, Pietersite for Jupiter, Tiger Eye for Saturn, Blue Calcite for Saturn and Lapis Lazuli for Neptune

With the upper assembly turning clockwise in 10 minutes and the base holding the planets turning clockwise in 10 minutes, the Astronomia Solar never looks the same way twice

Technical Specifications


MOVEMENT: Exclusive Manufacture Jacob & Co. Manual Winding JCAM19; Diameter: 34.55mm; Height: 16.50mm (11.70mm excluding Citrine); Components: 447; Material: Titanium; Power Reserve: 48 Hours; Frequency: 28,800 vib/h (4 Hz); Jewels: 43; System: Gravitational Double Axis Tourbillon; Finishing: Plate and Bridges: Sand-blasted and Angled; Geartrain: Circular Graining, Polished Sink; Polished Screws; Barrel: Circular Graining; Flat Balance Spring.

FUNCTIONS: Hours, Minutes Dial Rotating in 10 min on the Central Axis, PatentedDifferential Gears System; Rose Gold and Blue Lacquered Globe Rotating in 60sec on 2 Axes; Flying Tourbillon Cage in 60 seconds; Citrine Jacob cut® (288facets; ≈ 1.5cts) on top of the movement; Entire movement rotates clockwise 360degrees in 10 minutes; Aventurine base rotates counter-clockwise 360 degrees in 10 minutes, carrying 7 Planets made of Cabochon cut Precious Stones Half- Spheres: White Granite for Mercury, Rhodonite for Venus, Red Jasper for Mars, Pietersite for Jupiter, Tiger Eye for Saturn (18K Rose Gold applique for the rings)Blue Alcite for Uranus and Lapis Lazuli for Neptune.

CASE: Diameter: 44.5mm; Thickness: 21mm; Material: 18K Rose Gold and Sapphire; Case Back: 18K Rose Gold; Case Band: Single-piece Sapphire Crystal; Bows: Winding and Time-Setting via two 18K Rose Gold bows; Skylayer FrontCase: Aventurine; Crystal: Unique Domed Sapphire with double Anti-reflectiveTreatment.

DIAL & HANDS: Dial: Sapphire crystal with Rose Gold metallization; Hands: Blued steel.

STRAP & CLASP: Strap: Alligator; Buckle: 18K Rose Gold Folding clasp.

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



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