IWC · Portofino

Strap for Portofino Chronograph Stainless Steel / Silver / 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
ReferenceIW3910-32
FamilyPortofino
MovementIWC caliber 75320 hours, minutes, small seconds | date, day | Chronograph
Year2019
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Portofino IW3910-32

Selected for the 18 mm lug width

All 18 mm straps →

The Portofino IW3910-32, seen from the bench

The Portofino represents IWC's classic dress watch collection, characterized by clean and understated lines. It is powered by the IWC 75320 caliber with functions including hours, minutes, small seconds, date, day, and chronograph. The IW3910-32 reference maintains the traditional proportions of the Portofino line with a clean and legible dial.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only