Titanium case, Automatic, self-winding, Black rubber strap with EasX-CHANGE system, Strap width 20.0 mm. Small hacking seconds IWC bracelet quick-change system Sapphire glass, convex, antireflective coating on both sides Glass secured against displacement by drop in air pressure Day and date display Chronograph function with hours, minutes and seconds Tachymeter scale on bezel