IWC · Portofino
Strap for Portofino Chronograph Red Gold / Silver
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 diameter42 mm
ReferenceIW3910-20 (aka: 3910-20, IW391020)
FamilyPortofino
MovementIWC caliber 75320 hours, minutes, small seconds | date, day | Chronograph
Year2011
CaseRed Gold
Straps for the Portofino IW3910-20 (aka: 3910-20, IW391020)
Selected for the 20 mm lug width · workshop selection
Green Rubberized Alligator Strap with Ecru Tribal Stitching€149
Millennium Green Alligator Strap€195
Black Rubberized Alligator Strap with Red Tribal Stitching€185
Vintage Olive Green Calf Leather Watch Strap€80
Italian Calfskin Rally Strap in Cognac€110
The Portofino IW3910-20 (aka: 3910-20, IW391020), seen from the bench
The Portofino IW391020 is equipped with the IWC 75320 caliber featuring hour, minute, small seconds, date, day and chronograph functions. The watch presents a classic three-counter configuration with day of the week indication. The reference belongs to the Portofino collection by IWC dedicated to elegant Italian-inspired timepieces.
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