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. This Astronomia Solar Planets-Zodiac 44mm solar manual winding timepiece featuring a flying tourbillon. 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, a Topaz, and a Peridot stone with their exclusive Jacob-Cut® 288 facets complement the cutting-edge watchmaking feats of the Astronomia Solar Planets Jewelry. The time display sub-dial of the Astronomia Solar Jewelry Planets Zodiac 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 Zodiac signs on the blue dial are hand-engraved and filled with 18K rose gold, while the hand-finished hands are coated in 5N Rose Gold. Timepiece is presented on a blue alligator strap featuring an 18kt rose gold deployant buckle. Water resistant to 30m with a sapphire crystal. Price upon request.