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 Arlequino connects Astronomia with Jacob & Co’s singular gem-setting know-how. It is a cinematic sculpture animated by its four-arm movement construction that rotates and floats through the gem-set space inside its spectacular case. Full of unparalleled watchmaking solutions and adorned with exceptional gems and gem-setting techniques, the Astronomia Tourbillon Arlequino perpetuates Jacob & Co’s outstanding reputation in the field of haute horlogerie and haute joaillerie. The four arms of the Astronomia Tourbillon Baguette 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 spherical 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 Baguette 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 or 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 Baguette is at the forefront of ultra-high-end watchmaking: its delicately decorated cage encapsulates the balance wheel, hairspring, escape wheel and a number of other crucially important components. Characterized by this openworked cage, this constellation of superbly finished components rotates on three axes simultaneously. Following its hand-assembly and specialized fine-tuning procedures, the JCAM10 keeps 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 Baguette. 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.