IWC Schaffhausen Portugieser Chronograph Ceratanium®

The IWC Schaffhausen Portugieser Chronograph Ceratanium® IW371631 is a chronograph with a 41 mm case made of Ceratanium®. The case measures 13 mm thick, and the black dial sits under a convex sapphire crystal with antireflective coating on both sides. Water resistance is rated to 30 metres. Inside is the self-winding calibre 69355, which runs with a 46 hour power reserve. The chronograph is paired with small seconds, and the case back is a display back showing the movement. A black rubber strap is fitted to the watch, sized at 20 mm at the lugs. This piece belongs to a limited run of 1,500 examples.