IWC · Ingenieur
Strap for Ingenieur Perpetual Calendar Digital Date-Month 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 diameter45 mm
ReferenceIW3817-01 (aka: IW381701)
FamilyIngenieur
MovementIWC caliber 89800 hours, minutes, small seconds | big date, leap year, month, perpetual calendar, date | Chronograph, Flyback
Year2017
CaseRed Gold
The Ingenieur IW3817-01 (aka: IW381701), seen from the bench
The IWC Ingenieur IW3817-01 is a sophisticated chronograph from the Ingenieur collection, established in 1955 as the engineering watch standard. The 45mm red gold case houses the IWC caliber 89800 movement, featuring chronograph functions with flyback reset, perpetual calendar with month and year display, and magnetic protection via internal Faraday cage. The 20mm lug width is precisely calculated to balance the precious case mass with optimal visual harmony. Sapphire caseback reveals the complex movement geometry.
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