IWC Portugieser Chronograph IW371609. 41 mm stainless steel case. Black dial with seconds sub-dial at 6 o’clock, 30-minute counter at 12 o’clock. Automatic Swiss made IWC caliber 69355, features 27 jewels, 194 parts. Power reserve of 46 hours. Black alligator leather strap with folding buckle.