IWC Portofino Chronograph ref. IW391015, original warranty card

The IWC Portofino Chronograph ref. IW391015 reinterprets IWC’s pilot chronograph layout with refined elegance, featuring a polished 42mm case, silver dial, and slender stick markers that transition seamlessly from a cockpit to the boardroom. It houses running seconds, 30-minute and 12-hour totalizers (accented with a small touch of red), alongside day and date windows at 3 o’clock, all while maintaining superb legibility through IWC’s signature hands and clean dial layout. With its sophisticated detailing and balanced proportions, this model exemplifies IWC’s ability to blend function with timeless dress-watch aesthetics.

This watch is in good overall condition, displaying cosmetic signs of wear from regular use. Surface scratches and minor scuffs are visible, as shown in the photos, but few are very deep — a light polish would restore the case and clasp to an excellent condition if desired by the new owner. Mechanically, it performs exceptionally well, running at -1 seconds per day with a strong amplitude of 310 degrees when measured in a neutral position on a timegrapher.

This watch comes with its original warranty card, suede document pouch, instruction manual, service booklets, and microfiber cleaning cloth.

Brand: IWC Schaffhausen

Model: Portofino

Reference: IW391015 / IW3910-15

Year: 2013

Case size: 42mm

Case thickness: 13.5mm

Case material: Stainless steel

Dial: Silver

Movement: IWC calibre 75320

Water resistance: 30 meters

Functions: Chronograph, day, date

Strap/bracelet: IWC stainless steel Milanese bracelet with folding clasp

Lug width: 20mm