IWC · Portofino
Strap for Portofino Automatic Moon Phase 37 Red Gold / Diamond / Silver
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
ReferenceIW4590-09 (aka: IW459009)
FamilyPortofino
MovementIWC caliber 35800 hours, minutes, seconds | moonphase
Year2014
CaseRed Gold
Straps for the Portofino IW4590-09 (aka: IW459009)
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 IW4590-09 (aka: IW459009), seen from the bench
The Portofino IW4590-09 is a 37mm automatic watch in 18-carat red gold from IWC's Schaffhausen manufacture. It features the IWC 35800 calibre, a mechanical automatic movement with hours, minutes, seconds, and moon phase indicator, offering over 40 days power reserve. The case diameter is 37.00mm with an 18mm lug width, requiring precise strap compatibility for proper fitment.
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