IWC · Ingenieur

Strap for IWC Ingenieur IW4515-04

The Ingenieur Midsize Gold Index Strap takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

18mm
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Lug width18 mm
Case diameter34 mm
ReferenceIW4515-04 (aka: 4515-04, IW451504)
FamilyIngenieur
MovementIWC caliber 30110 Hours, Minutes, Seconds | Date
CaseStainless Steel

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 18 mm · Ø 1.8 mm double flange · industry standard, no brand part number

Ingenieur Midsize Gold Index Strap — watch

What I'm asked about the IWC Ingenieur IW4515-04

What strap size does the IWC Ingenieur IW4515-04 take?

The IWC Ingenieur IW4515-04 needs 18 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 IW4515-04 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 IW4515-04?

Yes, in 18 mm leather. On a 34 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the IWC Ingenieur IW4515-04?

A 18 mm calf strap, for every day. You'll find it ready in the 18 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