Stainless steel, 42 mm, IWC Portofino chronograph automatic wristwatch. Model reference IW391010. Black dial with three sub dials and day / date aperture at three o'clock. Stainless steel case and mesh bracelet with deployment closure. In working order. Comes with box, and paperwork dated September 2016. Additional blue leather strap with tooling and IWC polishing cloth supplied.