Jacob & Co Astronomia Tourbillon White Gold 50 mm watch. Model reference: AT100.30.AC.SD.A. 18K white gold case. Skeleton dial. Manual-winding movement. Black alligator leather strap with 18K white gold 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.