IWC · Portugieser

Strap for Portugieser Chrono-Rattrapante Rose Gold / Silver

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 diameter41 mm

ReferenceIW3712-04 (aka: 3712-04, IW371204)

FamilyPortugieser

MovementIWC caliber 76240 hours, minutes | Chronograph, Rattrapante

Year1995 - 2004

CaseStainless Steel

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 Portugieser IW3712-04 (aka: 3712-04, IW371204)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Portugieser IW3712-04 (aka: 3712-04, IW371204), seen from the bench

The Portugieser IW3712-04 is a 40.90mm stainless steel chronograph with split-second function, featuring the automatic IWC caliber 76240. This model represents the modern evolution of the 1939 Portugieser tradition, combining precision and legibility with a minimalist aesthetic. The 20mm lug width is proportioned to the case geometry and bicompax dial layout.

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