IWC · Portofino
Strap for Portofino Chronograph Stainless Steel / Black / Milanese
Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
18mm
Lug width18 mm
Case diameter42 mm
ReferenceIW3910-33 (aka: IW391033)
FamilyPortofino
MovementIWC caliber 75320
Hours, Minutes, Small Seconds | Date, Day | Chronograph
CaseStainless Steel
The Portofino IW3910-33 (aka: IW391033), seen from the bench
The Portofino IW391033 is powered by the IWC caliber 75320 with chronograph, date and day of the week functions. The movement offers hour, minute and small second indication on a classic dial. The case features the traditional Portofino collection design with integrated crown and chronograph pushers.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only