IWC · Portofino
Strap for Portofino Chronograph Stainless Steel / Silver - Blue
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 diameter42 mm
ReferenceIW3910-37 (aka: IW391037)
FamilyPortofino
MovementIWC caliber 79230
Hours, Minutes, Small Seconds | Date, Day | Chronograph, Rattrapante
CaseStainless Steel
The Portofino IW3910-37 (aka: IW391037), seen from the bench
The Portofino IW391037 is equipped with the IWC 79230 caliber with functions of hours, minutes, small seconds, date, day of the week, and split-seconds chronograph. The movement offers the complication of the double chronograph, which allows the measurement of split times through the split-seconds hand. The case features the classic design of the Portofino collection with integrated crown and chronograph pushers.
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