IWC · Portugieser

Strap for Portuguese Chrono-Rattrapante Barozzi

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

Lug width

20mm
Lug width20 mm
Case diameter41 mm
ReferenceIW3712-12 (aka: 3712-12, IW371212)
FamilyPortugieser
MovementIWC caliber 76240 hours, minutes | Chronograph, Rattrapante
Year2004 - 2004
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 Portugieser IW3712-12 (aka: 3712-12, IW371212)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Portugieser IW3712-12 (aka: 3712-12, IW371212), seen from the bench

The IWC Portugieser IW3712-12 is a chronograph with split-second function featuring a stainless steel case of 40.90 mm diameter and a 20 mm lug width. Equipped with the IWC caliber 76240 movement, it preserves the design identity of the 1939 Portugieser with a white dial, Arabic numerals, three subdials, and oval hands. The stainless steel case ages with dignity, developing patina characteristic of authentic use.

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