IWC · Portofino

Strap for Portofino Chronograph Red Gold / Ardoise

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm

20 mm straps All IWC

Lug width20 mm

Case diameter42 mm

ReferenceIW3910-26

FamilyPortofino

MovementIWC caliber 75320 Hours, Minutes, Small Seconds | Date, Day | Chronograph

CaseRed Gold

Spring bar

Swiss Standard universal spring bars

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

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Straps for the Portofino IW3910-26

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Portofino IW3910-26, seen from the bench

The IWC Portofino IW3910-26 is a 42mm Red Gold chronograph from the Swiss watchmaker's elegant Portofino collection. Powered by the IWC 75320 automatic caliber with chronograph functions, small seconds, date and day-of-week display, it features a brushed silver dial and a warm Red Gold case that develops a natural patina over time. The 20mm lug width is the specification required for this model and ensures proper fit with compatible straps.

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