The Jacob & Co. Astronomia Tourbillon Black Gold 50 mm (Model AT100.31.AC.SD.A) is a limited edition timepiece that showcases the brand's innovative craftsmanship. Encased in 18K white gold with a black DLC coating, this watch features a skeleton dial that reveals its intricate manual-winding movement. The black alligator leather strap with a folding clasp ensures both comfort and elegance. With a case diameter of 50 mm and a thickness of 25 mm, it offers a bold presence on the wrist. The watch is water-resistant up to 30 meters, making it suitable for everyday wear. Limited to 18 pieces, this timepiece is a testament to Jacob & Co.'s dedication to horological artistry.