IWC · Portofino
Strap for Portofino Automatic Day & Night 37 Red Gold
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
ReferenceIW4591-02 (aka: 4591-02, IW459102)
FamilyPortofino
MovementIWC caliber 35700 hours, minutes, seconds, Additional 24 hours Hand (adjustable)
CaseRed Gold
Straps for the Portofino IW4591-02 (aka: 4591-02, IW459102)
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
Grey Hammered Leather Strap with Ecru Stitching€98
Swift Red Leather Strap€120
The Portofino IW4591-02 (aka: 4591-02, IW459102), seen from the bench
The IWC Portofino IW4591-02 is an automatic watch with a 37mm Red Gold case and compact proportions designed as a daily companion. It features the IWC 35700 caliber, an automatic movement with hours, minutes, seconds, and a 24-hour complication, offering approximately 42 hours of power reserve and precision of -4/+6 seconds per day. The 18mm lug width is proportioned to the case size, and Red Gold resists corrosion while developing a characteristic patina over time.
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