IWC · Ingenieur
Strap for Ingenieur 666AD Stainless Steel / Black
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 diameter37 mm
Reference666AD
FamilyIngenieur
MovementIWC caliber IWC 8521
Hours, Minutes, Seconds
CaseStainless Steel
The Ingenieur 666AD, seen from the bench
The IWC Ingenieur Ref. 666AD is a professional timepiece from the 1970s designed by Gérald Genta in 1976, featuring a compact 36.5mm stainless steel case and revolutionary antimagnetic technology integrated into the IWC caliber 8521 automatic movement, protecting against electromagnetic interference up to 80,000 A/m. The watch maintains a 12mm case depth and 18mm lug width, with a transparent caseback revealing the movement and balance cock. Available with silver or deep blue dials featuring white gold applied indices and a satin-finished steel crown.
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