IWC Watch Portofino Chronograph. IW391031. For those that value precision, performance and prowess just as much as aesthetic beauty need look no further than this IWC Portofino Chronograph. Taking inspiration from the swinging sixties and the elegant Italian fishing town of the same name, the men’s IWC watch is presented with a neatly sized 42mm stainless steel case with polished finishing, convex sapphire crystal glass with anti-reflective coating and a black alligator leather strap handcrafted by Italian shoe manufacturer Santoni. For optimal comfort and elegance, the strap is completed by a matching stainless steel pin buckle stamped with the iconic IWC emblem. Housed within the IWC Portofino Chronograph watch is the 75320 Calibre automatic winding movement which alongside its 44 hour power reserve, 25 jewels and frequency of 28,800 vibrations per hour delivers remarkable chronograph complication on a pure silver-plated dial. Controlled by elegantly sporty push buttons on the right hand side of the case, the Swiss made movement provides central hands for hours, minutes and chronograph seconds, a small seconds dial at 9 o’clock and two chronograph counters for 30 minutes and 12 hours. An easy to read day and date window sits at 3 o’clock dressed in white and black to beautiful compliment the nearby rose gold indexes and black printed minutes track.