IWC · Ingenieur
Strap for Ingenieur SL Automatic Stainless Steel / Champagne / Bracelet
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 diameter34 mm
ReferenceIW3505-04
FamilyIngenieur
MovementIWC caliber 375 hours, minutes, seconds | date
Year1983 - 1990
CaseStainless Steel
The Ingenieur IW3505-04, seen from the bench
The IWC Ingenieur IW3505-04 is a vintage Swiss watchmaking masterpiece from the 1950s, featuring a 34mm stainless steel case with a Faraday cage for magnetic resistance. It is powered by the IWC caliber 375 automatic movement, vibrating at 18,000 oscillations per hour, with date window and approximately 42 hours power reserve. The lug width is 20mm, a specific dimension designed to ensure proportional harmony between the case diameter and strap thickness.
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