IWC - Ingenieur Constant-Force Tourbillon Watch IW590001

46 mm platinum and ceramic case, sapphire-glass back, screw-in crown, black dial, hand-wound calibre 94800 movement with power reserve display, perpetual moon phase display, double moon phases for the northern and southern hemispheres, countdown display showing phases until next full moon, and tourbillon with integrated constant-force mechanism, approximately 94 hours of power reserve, black alligator leather strap. Water resistant to 12 bar.