Jacob & Co. Astronomia Tourbillon Stallion Black 50 mm watch. Model reference: AT100.40.HA.UA.A. Black DLC Grade 5 titanium case with sapphire apertures on sides. Skeleton dial. Manual-winding movement. Black alligator leather strap with folding clasp. Swiss made. The watch comes in the original packaging, with a set of documents and 2 years warranty. At Modern Wrist we offer new authentic watches at the best prices.