IWC · Ingenieur

Strap for IWC Ingenieur IW3784-02

The Big Ingenieur Chronograph Rose Gold / Black / Strap takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
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Lug width20 mm
Case diameter46 mm
ReferenceIW3784-02 (aka: 3784-02, IW378402)
FamilyIngenieur
MovementIWC caliber 89360 Hours, Minutes, Small seconds | Date | Chronograph, Flyback
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Standard spring bar · length 20 mm · Ø 1.8 mm double flange · industry standard, no brand part number

Big Ingenieur Chronograph Rose Gold / Black / Strap — watch

What I'm asked about the IWC Ingenieur IW3784-02

What strap size does the IWC Ingenieur IW3784-02 take?

The IWC Ingenieur IW3784-02 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 IW3784-02 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 IW3784-02?

Yes, in 20 mm leather. On a 46 mm chronograph I like box calf: it holds its shape and carries a substantial case.

Which strap do you recommend for the IWC Ingenieur IW3784-02?

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 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