IWC · Portofino
Strap for Portofino Automatic 37 Stainless Steel / 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
ReferenceIW4581-03 (aka: 4581-03, IW458103)
FamilyPortofino
MovementIWC caliber 35111
Hours, Minutes, Seconds | Date
CaseStainless Steel
The Portofino IW4581-03 (aka: 4581-03, IW458103), seen from the bench
The Portofino IW4581-03 is a classic dress watch by IWC Schaffhausen, conceived in the 1980s inspired by the Ligurian Riviera. The 37mm stainless steel case features a clean dial with baton indices, sword hands, and date window at 3 o'clock. Powered by the IWC 35111 automatic movement with 42 hours power reserve, this refined timepiece embodies understated elegance. The lug width is 18mm.
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