IWC Portugieser Chronograph Classic Watch - 42 mm Red Gold Case - Silver Dial - Brown Alligator Strap - IW39030142 mm 18K red gold case, 14. 2 mm thick, sapphire back, convex sapphire crystal with antireflective coating on both sides, silver plated dial, calibre A8936102 self winding movement with flyback chronograph, hour and minute counters combined in a totalizer at 12 oclock, small hacking seconds, and date display, approximately 68 hours of power reserve, brown alligator leather strap. Water resistant to 3 bar.