IWC · Portugieser

Strap for Portuguese Chrono-Rattrapante Red Gold / Blue / Boutique Milano

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

ReferenceIW3712-15 (aka: IW371215, 3712-15, 371215)

FamilyPortugieser

MovementIWC caliber 76240 Hours, Minutes | Chronograph, Rattrapante

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 Portugieser IW3712-15 (aka: IW371215, 3712-15, 371215)

Selected for the 20 mm lug width · workshop selection

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The Portugieser IW3712-15 (aka: IW371215, 3712-15, 371215), seen from the bench

The IWC Portugieser IW3712-15 is a modern evolution of a 1939 legend, featuring an 18k red gold case of 40.90mm diameter and a manual-wind IWC calibre 76240 movement with chronograph and split-seconds function. The 20mm lug width is integral to the model's proportions and requires specifically matched straps. This timepiece maintains the original Portugieser philosophy of proportion, legibility and reliability established for Portuguese merchants over 80 years ago.

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