IWC · Portofino
Strap for Portofino Automatic 37 Stainless Steel / Diamond / Ardoise
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter37 mm
ReferenceIW4581-04 (aka: 4581-04, IW458104)
FamilyPortofino
MovementIWC caliber 35111
Hours, Minutes, Seconds | Date
CaseStainless Steel
Straps for the Portofino IW4581-04 (aka: 4581-04, IW458104)
Selected for the 20 mm lug width · workshop selection
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
Novonappa Black Strap — IWC Pilot Style€149
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
The Portofino IW4581-04 (aka: 4581-04, IW458104), seen from the bench
The Portofino represents the dress watch line of IWC with an essential design and basic functions. It is powered by the caliber 35111 with hour, minute, second and date indications. The IW458104 reference maintains the classic proportions typical of the Portofino collection.
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