The IWC Portofino Chronograph (ref. IW391027) takes its design cues from the 1960s, with elegantly sporty push-buttons and chronograph displays. The stainless
CASE Stainless steel case Diameter 45.0Â mm Height 11.7Â mm Water resistance 3 bar MOVEMENT 59210 Calibre IWC-manufactured movement Manual-winding 192 hours