IWC · Portofino
Strap for Portofino Automatic 37 Stainless Steel / Ardoise
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 diameter37 mm
ReferenceIW4581-02 (aka: 4581-02, IW458102)
FamilyPortofino
MovementIWC caliber 35111 hours, minutes, seconds | date
CaseStainless Steel
Straps for the Portofino IW4581-02 (aka: 4581-02, IW458102)
Selected for the 18 mm lug width
Hammered Calfskin Strap Light Blue€98
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered Pink Strap with Ecru Stitching€98
Hammered Yellow Strap with Ecru Stitching€98
Hammered calfskin strap in cuoio€98
Saffiano Red Strap Ecru Stitching€90
The Portofino IW4581-02 (aka: 4581-02, IW458102), seen from the bench
The Portofino Automatic IW4581-02 is a 37mm stainless steel watch from IWC Schaffhausen, featuring the caliber 35111 movement with hours, minutes, seconds and date display. The minimalist dial showcases baguette indices on a silvered background, paired with an 18mm lug width that defines its refined proportions. This model embodies Swiss engineering heritage and Italian design inspiration.
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only