IWC Portofino IW391031 42 mm Silver Dial

IW391031 is the Portofino Chronograph in a crisp, silver-dialled configuration. Its 42 mm stainless-steel case balances the collection's dressier instincts with the purposeful presence of a chronograph, while the black alligator-leather strap keeps the overall effect refined. The solid caseback and 30-metre water resistance underline its role as a polished everyday complication rather than a tool watch.

Calibre 79320 provides automatic chronograph operation alongside day and date displays. The movement is based on the Valjoux 7750 and uses cam control with lateral coupling. Its 30 mm diameter contains 240 components and 31 jewels, with a 4 Hz frequency and 44 hours of power reserve. The result is a well-defined mechanical layout that gives the Portofino its useful timing function without disturbing its restrained proportions.