IWC · Ingenieur
Strap for Ingenieur SL Automatic Stainless Steel / Silver / 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
ReferenceIW3505-03 (aka: IW350503)
FamilyIngenieur
MovementIWC caliber 375 hours, minutes, seconds | date
Year1983 - 1990
CaseStainless Steel
The Ingenieur IW3505-03 (aka: IW350503), seen from the bench
The IWC Ingenieur IW3505-03 is a 34mm stainless steel antimagnetic timepiece designed by Gérald Genta in 1976, featuring the IWC 375 manual-wind caliber with hours, minutes, seconds and date function. The watch exemplifies 1970s rationalist design with a polished bezel, minimalist dial and integrated mesh bracelet. The 20mm lug width ensures compatibility with a wide range of aftermarket straps while maintaining aesthetic integrity and original specifications.
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