ASTRONOMIA TOURBILLON BAGUETTE MODEL, REF. AT800.30.BD.BD.A, CASE NO. 3⁄18

From the house of Jacob & Co., a brand renowned for its fearless approach to high-concept horology, comes this exceptionally rare and radiant Astronomia Tourbillon Baguette. Making its first appearance at auction, this reference AT800.30.BD.BD.A is case number 3 of a strictly limited edition of only 18 pieces. The 18K white gold case is completely set with 359 baguette-cut diamonds, totaling approximately 15.77 carats. This timepiece represents the pinnacle of the Maison's ability to fuse astronomical complications with high jewellery artistry. Beneath the domed sapphire crystal, a 1.00 carat 'Jacob Cut' diamond with 288 facets orbits alongside the triple-axis tourbillon, creating a celestial ballet of unparalleled brilliance. For the discerning collector, this Astronomia Tourbillon Baguette — offered here for the first time at auction — represents an unrivaled opportunity to acquire one of Jacob & Co.'s most spectacular creations.

The Jacob Cut Diamond
The Jacob Cut diamond represents a revolutionary approach to diamond faceting, conceived by Jacob & Co. founder Jacob Arabo. Unlike the traditional round brilliant cut which features 57 or 58 facets, the proprietary Jacob Cut boasts an extraordinary 288 facets. This unprecedented number of facets enhances the stone's ability to capture, refract, and return light from every angle, producing a brilliance and fire that far exceeds that of conventionally cut diamonds. Each Jacob Cut diamond requires hundreds of hours of precision cutting and polishing by master gem cutters, making it an exceptionally rare and labor-intensive gem. The result is a diamond that an almost ethereal radiance, perfectly complementing Jacob & Co.'s philosophy of creating timepieces and jewels that defy convention and push the boundaries of both horological and gemological artistry.