Jacob & Co. Astronomia Tourbillon Icy Blue Degrade Sapphires 50 mm watch. Model reference: AT800.30.BD.UA.B. 18K white gold case set with sapphire crystal apertures on sides. Skeleton dial set with diamonds. Manual-winding movement. Black alligator leather strap. 18K white gold folding clasp invisibly set with 22 baguette white diamonds. 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.