The Astronomia is the epitome 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 and has been regarded as an outstanding multidisciplinary engineering achievement.

The Astronomia Tourbillon Ceramic represents a futuristic and menacing take on the very essence of Astronomia: its cinematic sculpture, four-arm movement construction floats through the sapphire-bound space inside its ultra modern, black ceramic case. Full of unparalleled watchmaking solutions and adorned with exceptional finishing techniques, the Astronomia 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 hand-painted blue for a spectacular representation of Planet Earth, the exclusive Jacob-Cut® 1-carat diamond with 288 facets, and the differential-leveled, 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.

Whereas 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 224-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 openworked 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.

The globe is made of black-lacquered magnesium with white gold continents 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.

The Astronomia Tourbillon Ceramic's case measures 50 millimeters in diameter and 25 millimeters thick between the highest point of its specially curved front sapphire crystal and the lowest point of its case. Presented in glossy black ceramic, a virtually scratch-proof and unapologetically futuristic-looking material, the case features four sapphire crystal windows installed throughout its periphery, allowing for the unhindered viewing of the spectacular caliber inside.

The time display sub-dial of the Astronomia Tourbillon Ceramic is driven through an infinitesimal differential system that allows it to always remain levelled and legible as it rotates together with the movement's four-armed platform. The Roman numerals on the skeletonized dial are hand-engraved and filled with black lacquer and the hand-finished hour and minute hands turn over top.