IWC · Ingenieur
Strap for IWC Ingenieur IW3808-BY
The Ingenieur Chronograph Custom Stainless Steel / Black-Silver-Red / Calf takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
What I'm asked about the IWC Ingenieur IW3808-BY
What strap size does the IWC Ingenieur IW3808-BY take?
The IWC Ingenieur IW3808-BY needs 20 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the IWC Ingenieur IW3808-BY be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the IWC Ingenieur IW3808-BY?
Yes, in 20 mm leather. On a 42 mm chronograph I like box calf: it holds its shape and carries a substantial case.
Which strap do you recommend for the IWC Ingenieur IW3808-BY?
A 20 mm box calf. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
The Ingenieur IW3808-BY, seen from the bench
Frequently asked questions
What is the best strap for the IWC Ingenieur IW3808-BY?
The choice of the best strap depends on use and aesthetic preferences. For formal occasions, we recommend dark brown alligator or black calf, materials that harmonize perfectly with the brushed steel case. For a more sporty and functional approach, a vulcanized rubber or woven NATO strap maintains coherence with the watch's technical identity. All materials must have a 20 millimeter lug width.
Can I use an aftermarket strap on this model?
Yes, perfectly compatible. High-quality artisanal aftermarket straps, such as those from Milano Straps, are specifically made in 20mm width for IWC Ingenieur models. The quality of the leather, stitching, and finishing of the ends guarantee an aesthetic and functional result equivalent to or superior to OEM straps. Many collectors prefer this solution to have more color and tactile versatility while maintaining high values.
How long does a leather strap last on an IWC Ingenieur IW3808-BY?
A high-quality artisanal leather strap lasts an average of 3 to 5 years with daily use, varying based on the type of leather (alligator more resistant than calf), direct sun exposure and environmental humidity. Natural leather develops a patina that increases its charm over time, but requires periodic maintenance: gentle cleaning with a damp cloth and annual conditioning with specialized protective creams. Casati Milano straps include an 18-month warranty and consultation for extending longevity.
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
Bespoke straps for IWC, in the atelier or by video call: casatimilano.com