Jacob & Co. : Houston, we have a complication

Astronomia Sky 

Case : 18K pink gold, lift-out rotating bows for setting and adjustment, domed sapphire crystal, water-resistant to 30m Diameter : 47mm Movement : mechanical hand-wound (JACM11 caliber in titanium, 60h power reserve), 393 components, hand-crafted haute horlogerie finishing, triple-axis gravitational tourbillon (60-second, 50-minute and 20-minute rotations) Functions : hours and minutes via a patented differential, perpetual calendar, leap years, day/night, sidereal display, diamond spherical moon Dial : rotating over a sidereal year, made of grade 5 titanium, gold stars and Zodiac signs engraved on a rotating celestial vault Strap : alligator leather with pink gold folding clasp 18-piece numbered limited series

After the stunning Astronomia that appeared at Baselworld 2015, Jacob & Co. is launching a new UFO in the Haute Horlogerie galaxy this year, featuring a world premiere in the modern High Jewelry universe. The patented Jacob Cut of the spherical 288-facet diamond symbolizing the moon lights up the celestial vault depicted on the dial that it sweeps around in 20 minutes, all the while performing 60-second rotations on its own axis. Truly mesmerizing ! Yet this is only one of the eight main characteristics of the Astronomia Sky, equipped with a triple-axis gravitational tourbillon with astronomical sidereal display. For the first time ever, a sidereal calendar is depicted in three dimensions, while a star-studded sky appearing on a grade 5 titanium dial makes one rotation in a sidereal year : the time required for the Earth to complete its orbit and, as seen from the earth, for the sun to regain the same position among the stars in the celestial vault. The globe levitating in the center naturally performs its rotation in one sidereal day and is complemented by a day/night indicator. The Astronomia Sky also comprises a perpetual calendar, with months displayed on the edge of the dial and visible through the domed crystal. Asking for the moon is no longer enough; wearing the galaxy on their wrist will be the exclusive privilege of 18 lucky future owners.


Brice Lechevalier is editor-in-chief of GMT and Skippers, which he co-founded in 2000 and 2001 respectively. He has also been CEO of WorldTempus since it joined the GMT Publishing stable, of which he is director and joint shareholder. In 2012 he created the Geneva Watch Tour, and he has been an advisor to the Grand Prix d’Horlogerie de Genève since 2011. Also closely involved in sailing, he has published the magazine of the Société Nautique de Genève since 2003, and was one of the founders of the SUI Sailing Awards in 2009 and the Concours d’Elégance for motor boats at the Cannes Yachting Festival in 2015.

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