IWC · Portofino
Strap for Portofino Automatic Moon Phase 37 White Gold / Diamond / Black
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
ReferenceIW4590-04 (aka: 4590-04, IW459004)
FamilyPortofino
MovementIWC caliber 35800
Hours, Minutes, Seconds | Moonphase
CaseWhite Gold
The Portofino IW4590-04 (aka: 4590-04, IW459004), seen from the bench
The IWC Portofino IW4590-04 is a 37mm white gold dress watch featuring the IWC Caliber 35800 automatic movement with moon phase complication. The clean dial displays hours, minutes, seconds, and a lunar phase window. The white gold case offers neutral tone and water resistance suited for formal wear. The 18mm lug width is proportionally calibrated to the 37mm case diameter, ensuring visual balance characteristic of IWC Schaffhausen's dress watch tradition.
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