IWC Portigieser Yacht-Club ’Ardoise’ Edition Flyback Chronograph in Stainless Steel with a Slate-Coloured Grey Dial and Slightly recessed matching grey sub-dials. Applied polished steel Arabic Numeral hour markers. The silvered flange at the perimeter of the dial with fine printed seconds & fractions of a second indication for the stopwatch/chronograph.

The 43.5mm solid three-body case, downturned lugs, and rounded bezel are polished. This flyback chronograph has round pushbuttons and a protected screwed-down crown. The crystal and display case back are scratch-resistant sapphire. The dial is absolutely stunning in Slate-Coloured Grey with applied silver Arabic numeral hour index markers and epee hands, with a red-needle chronograph hand. The subsidiary dial at the 12 o’clock position is a totalizer with both the 60-minute register with the longer hand pointing to the outer ring, as well as the 12-hour indicator with the shorter hand which points to the markings on the inner ring. A small hacking seconds subsidiary dial is at 6 o’clock, and a date window is located at 3 o’clock. Features a "Flyback" function, which allows instant restarting of the chronograph with a single push of the button instead of the need to stop, reset & then restart the stop-watch. It’s water resistant to 60 meters (6 bar), and it has a 68-hour power reserve at full wind. This IWC Portuguese Yacht Club Chronograph, IW390503 is fitted on a black vulcanized rubber strap with a stainless steel deployant buckle. 

The automatic winding in-house IWC-manufactured movement 89361 movement is guilt brass with oeil-de-perdrix embellishment. Comprised of 299 Components and 38-Jewels; it features Côtes de Genève perlage and has a straight-line lever escapement, a monometallic balance adjusted to 5 positions, and a self-compensating flat balance spring. It includes a hacking mechanism and a shock absorber.

Reference No. IW390503