IWC Da Vinci Tourbillon Retrograde Chronograph Watch - 44.0 mm 5N Gold Case - Silver Dial - Dark Brown Alligator Strap - IW393101

44.0 mm 18K 5N gold case, 16.9 mm thick, see-through sapphire glass back, arched-edge sapphire glass crystal with antireflective coating on both sides, silver-plated dial, calibre 89900 automatic movement with chronograph, flyback, column wheel, hours, minutes, small seconds, tourbillon escapement, approximately 68 hours of power reserve, dark brown alligator leather strap by santoni. Water resistant to 3 bar.