IWC · Portofino
Strap for Portofino Automatic Moon Phase 37 Red Gold / Diamond / MOP / Bracelet
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
ReferenceIW4590-05 (aka: 4590-05, IW459005)
FamilyPortofino
MovementIWC caliber 35800 hours, minutes, seconds | moonphase
Year2014
CaseRed Gold
Straps for the Portofino IW4590-05 (aka: 4590-05, IW459005)
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 IW4590-05 (aka: 4590-05, IW459005), seen from the bench
The IWC Portofino IW4590-05 is a refined dress watch featuring a 37mm red gold case with moon phase complication. Powered by the IWC 35800 caliber movement, it displays hours, minutes, and large date alongside lunar indication. The 18mm lug width accommodates interchangeable straps, making this classic timepiece adaptable for various occasions while maintaining its understated elegance and precise engineering.
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