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Astronomia Solar Baguette Icy Blue Sapphires

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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 its unprecedented concept and its entire mechanical construction, the Astronomia is a multidisciplinary engineering achievement. Extrapolated from the original Astronomia calibre, the Astronomia Solar is the most compact in the collection of Astronomia calibers.

Within its 44mm case, the Astronomia Solar Baguette Icy Blue Sapphires displays the precious planets of our Solar System as Jacob-Cut®, 288-facet gemstone spheres, placed on the rotating platform of the Astronomia Solar caliber. Its three main arms carry the differential-driven, self-leveling time display, the hand-painted blue magnesium Earth globe and the one-minute flying tourbillon regulating organ.

Its secondary arms carry three Jacob-Cut®, 288-facet stones, along with a center-mounted, 2 ct orange garnet stone to represent our Sun. The Astronomia Solar Baguette Icy Blue Sapphires is a beautifully artistic, highly refined and fully mechanical recreation of our solar system, to be appreciated like it has never been done before.


The Exclusive JCAM19 caliber of the Astronomia Solar Baguette Icy Blue Sapphires stands out from the range of Astronomia calibers by being a more compact iteration of the original This in turn allows smaller case dimensions as well as redesigned proportions. Composed of 444 components, all finished to the highest standards of haute horlogerie, the Astronomia Solar Baguette Icy Blue Sapphires movement features two rotating platforms. One comprises the several arms of the caliber, while the other is the base dial.

The rotating upper platform of the JCAM19 caliber completes a clockwise rotation in 10 minutes, while simultaneously driving the diamond-set base dial in a counterclockwise rotation in ten minutes. This adds even further animation and complexity to this unique take on celestial watchmaking.

a group of colorful objects


The Astronomia Solar Baguette Icy Blue Sapphires brings a host of beautifully executed, astronomically inspired details to the world of Astronomia. A view on four planets from our solar system can be admired with a hand-painted blue magnesium globe for Planet Earth and three gemstones crafted in the most complex of cuts. An amethyst, topaz and peridot, with their exclusive 288-facet Jacob-Cut complement the watchmaking feats of the Astronomia Solar Baguette Icy Blue Sapphires.

Underneath the rotating arms, the base dial has been entirely set with a total of 231, medium blue, aka Icy Blue sapphires. All of them are baguette-cut, and cut accordingly to their position on the dial. On top of this incredible sapphire layer lie hand-painted planets that enhance this spectacular, rotating backdrop.

a blue and silver watch

Astronomia Solar Baguette Icy Blue Sapphires Video

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The tourbillon was originally invented to be a single-axis, rotating cage to carry the regulating organ of a mechanical watch for improved timekeeping performance. The Astronomia Solar Baguette Icy Blue Sapphires presents this 224-year-old invention in a yet more spectacular way.

The one-minute flying tourbillon of the Astronomia Solar Baguette Icy Blue Sapphires features a delicately decorated cage that encapsulates the balance wheel, hairspring and escape wheel. This openworked, rose-gold titanium cage is only secured from underneath, which makes it a flying tourbillon. 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.

a close-up of a compass


The Astronomia Solar Baguette Icy Blue Sapphires' case measures 44 millimeters in diameter and 21 millimeters thick. 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.

The focus on the small universe that lives inside the Astronomia Solar Planets Jewelry is assisted by the baguette-cut, diamond-set lugs - a major detail that drives the eye towards the center of the timepiece.

a record player with a record


The time display sub-dial of the Astronomia Solar Planets Zodiac is driven by a differential system that allows it to always remain leveled and hence perfectly legible, along 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.

a glass bowl with a blue and white design on it

Technical Specifications


Caliber: Exclusive Manufacture Jacob & Co. Manual Winding JCAM19
Diameter: 34.55 mm
Height: 16.50 mm
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 sec
• Rose Gold and Blue Lacquered Globe Rotating in 60 sec
• Hours and Minutes Dial, Patented Differential Gears System
Exclusive Jacob cut® Orange Garnet (288 facets; ≈ 2 ct.) on top of the movement
Frame carrying 3 Jacob-cut Gemstones: Amethyst, Topaz and Peridot
Power Reserve: 48 Hours
Frequency: 28,800 vib/h (4 Hz)
Jewels: 43
Finishings: Plate and Bridges: Sand-blasted and Beveled; Geartrain: Circular Graining, Polished Sinks; Polished Screws; Barrel: Circular Graining

Diameter: 44 mm
Height: 21 mm
Material: 18K Rose Gold
Base: set with 231 Baguette Icy Sapphires (≈ 8.74 ct.); Hand-painted planets
Lugs: Set with 76 Baguette-cut Diamonds (≈ 4.84 ct.)
Case Back: 18K Rose Gold
Bows: Winding and Time-Setting via two 18K Rose Gold bows
Crystal: Unique Domed Sapphire with double Anti-Reflective Treatment
Water resistance: 30 m (3atm)

Dial & Hands:
Dial: Blue PVD Dial with Rose Gold-plated Engraving of Zodiac Signs
Hands: Rose Gold Jacob&Co-designed hands

Strap & Clasp:
Strap: Blue Alligator Leather
Clasp: 18K Rose Gold Folding clasp set with 21 Baguette-cut Diamonds (≈ 1.07 ct.)

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