IWC · Da Vinci
Strap for Da Vinci Perpetual 3921 Stainless Steel / Slate
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 diameter43 mm
ReferenceIW3921-03 (aka: IW392103, 392103, 3921-03)
FamilyDa Vinci
MovementIWC caliber 89630
Hours, Minutes, Small Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph, Flyback | Moonphase
CaseStainless Steel
The Da Vinci IW3921-03 (aka: IW392103, 392103, 3921-03), seen from the bench
The IWC Da Vinci IW3921-03 is a perpetual chronograph featuring a 43mm stainless steel tonneau case paired with an 18mm lug width. It houses the automatic IWC 89630 calibre with Breguet balance and silicon hairspring. The perpetual calendar includes year indicator, annual leap-year calendar, moonphase, and flyback chronograph function. Water resistance is 30m, suitable for daily wear with conservative safety margins.
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