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Astronomia Solar Baguette Diamonds And Blue Sapphires


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.

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.

Exclusive Astronomia Caliber

The exclusive JCAM28 caliber of the Astronomia Solar Baguette Diamonds and Blue Sapphires is composed of 447 components with finishes to the highest standards of haute horlogerie. The three-arm vertical movement includes a flying tourbillon, a magnesium globe and the hours and minutes subdial; while three subsidiary arms carry colored gemstones, each with the 288-facet Jacob-Cut, which represent planets. The entire celestial scene completes a clockwise rotation around the center of the watch every 10 minutes.

a close-up of some coins

Red Garnet

In the center of this timepiece above the display is a spherical 2.28-carat Red Garnet featuring the exclusive 288-facet Jacob-Cut. It serves as a fiery red sun. Serving as planets are three more spherical colored gems — Amethyst, Citrine and Peridot, all featuring the Jacob-Cut. This is in addition to the exclusive spinning globe of the earth that is part of every Astronomia watch. The globe is made of rose gold and blue lacquer and performs a full rotation every 60 seconds.

a close up of a blue plate

Astronomia Solar Baguette Diamonds And Blue Sapphires VIDEO

a plate of food


The tourbillon was invented more than 200 years ago as a single-axis, rotating cage secured from above and below designed to for the improved timekeeping performance of a pocket watch. The Astronomia Solar Baguette Diamonds and Blue Sapphire presents this invention in a more spectacular way.

The one-minute flying tourbillon of the The Astronomia Solar Baguette Diamonds and Blue Sapphire 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 JCAM28 to keep accurate time throughout its 48-hour power reserve.

a circular ceiling with many round objects


Serving as a spectacular backdrop for the Astronomoia movement and the precious celestial bodies that make up the Astronomia Solar is the white diamond and sapphire base. The 80 baguette white diamonds and 160 baguette blue sapphires are invisibly set and arranged in neat blue and white rows that add another level of brilliance to the astronomical scene.

a close-up of a compass


The Astronomia Solar Baguette Diamonds and Blue Sapphires jewelry' case measures 47mm in diameter and 21mm 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 gemstones inside. One's focus on the universe that lives inside the Astronomia Solar is further assisted by the openworked lugs - a minute, yet important detail that drives ones vision towards the center of the timepiece.

a clock with a weather vane


The time display subdial of the Astronomia Solar Baguette Diamonds and Baguette is driven through an infinitesimal differential system that allows it to always remain level and legible, even as the movement's platform performs its continuous, 10-minute orbit. The Roman numerals on the 18k rose gold skeletonized dial are hand-engraved and filled with black lacquer. The dial is complete with blued Jacob & Co. hands.

Technical Specifications


Caliber: Exclusive Manufacture Jacob & Co. Manual Winding JCAM28
Diameter: 34.55mm
Height: 16.50mm
Components: 447
Material: Titanium
Functions: Hours and Minutes
System: Vertical Movement with 3 Arms, Full Revolution in 10 min around a Central Axis
• Flying Tourbillon Cage in 60 seconds
• Rose Gold and Blue Lacquered Globe Rotating in 60 sec
• Hours and Minutes Dial, Patented Differential Gears System℗ allows
to keep the 12/6 O'clock position
Red Garnet Jacob cut® (288 facets: ≈ 2.28 ct.) on top of the movement;
Frame carrying 3 Jacob cut® Gem Stones: Amethyst, Citrine and Peridot.
Power Reserve: 48 Hours
Frequency: 28,800 vib/h (4 Hz)
Jewels: 43
Finishing: Plate and Bridges: Sand-blasted and Angled; Geartrain: Circular Graining, Polished Sink; Polished Screws; Barrel: Circular Graining; Flat Balance Spring.


Diameter: 47mm
Height: 21mm
Material: 18K Rose Gold set with 116 Baguette White Diamonds and 28 Baguette Blue Sapphires (total: ≈ 9 ct.)
Case Back: 18K Rose Gold
Case Band: Single-piece Sapphire Crystal
Bows: Winding and Time-Setting via two 18K Rose Gold bows
Layer Front Case: 80 Baguette White Diamonds and 160 Baguette Blue Sapphires (total: ≈ 8 ct.)
Crystal: Unique Domed Sapphire with double Anti-Reflective Treatment
Water resistance: 30m (3atm)


Dial: 18K Rose Gold, Hand Angled and Polished, Lacquered Indexes
Hands: Blued "Jacob&Co" designed hands


Strap: Alligator
Clasp: 18K Rose Gold Folding clasp set with 21 Baguette Diamonds (≈ 1.07cts)

Pièce Unique


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

Contact Us

Flagship Boutique
/ Corporate Office

48 East 57 Street
New York, NY 10022
+1 (212) 719-5887
Jacob & Co

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