The IW391406 is the silver-plated-dial Portofino Chronograph 39 in stainless steel on a black alligator strap. Official IWC claims support the 39 mm case, calibre 79350 automatic chronograph movement, 44-hour power reserve, 28,800 vph beat rate, 3 bar water resistance, and 20 mm strap width.
Open in The Dial Atlas