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IWC · Portugieser

Strap for IWC Portugieser IW3716-01

The Portugieser Chronograph "150 Years" Stainless Steel / Blue takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll IWC
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Lug width20 mm
Case diameter41 mm
ReferenceIW3716-01 (aka: IW371601)
FamilyPortugieser
MovementIWC caliber 69355 Hours, Minutes, Small seconds | Chronograph, Column wheel
Year2018
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

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Straps for the Portugieser IW3716-01

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

What I'm asked about the IWC Portugieser IW3716-01

What strap size does the IWC Portugieser IW3716-01 take?

The IWC Portugieser IW3716-01 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 Portugieser IW3716-01 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 Portugieser IW3716-01?

Yes, in 20 mm leather. On a 41 mm chronograph I like box calf: it holds its shape and carries a substantial case.

Which strap do you recommend for the IWC Portugieser IW3716-01?

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 Portugieser IW3716-01, seen from the bench

The Portugieser Chronograph "150 Years" IW3716-01 is a manual-wind chronograph in stainless steel with a 41 mm case diameter and 20 mm lug width. It houses the IWC caliber 69355 movement, featuring column wheel, lever escapement, and vertical clutch chronograph mechanism. Born from the Portuguese watch-making tradition, this model prioritizes functional design and precise legibility without ornamental excess.

Frequently asked questions

Which strap is most suitable for the Portugieser IW3716-01?

For the Portugieser IW3716-01, alligator straps (in dark brown or tobacco) and vegetable-tanned calf represent the most considered choices. Alligator maintains its shape over time and develops patina; vegetable-tanned calf creates an organic dialogue with the stainless steel case. Shell cordovan and leather NATO straps are valid alternatives depending on intended usage.

Can I fit a third-party aftermarket strap on my Portugieser IW3716-01?

Yes, any strap with a 20mm lug width is compatible with the Portugieser IW3716-01. Artisanal straps produced by specialised ateliers often maintain superior construction quality compared to OEM straps, featuring finer leathers and hand-sewn stitching.

How long does a quality leather strap last on the Portugieser IW3716-01?

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) has a lifespan of 4-7 years with daily wear, extendable to 10-12 years with occasional use and periodic maintenance. Longevity depends on exposure to humidity, perspiration and direct sunlight.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only

Bespoke straps for IWC, in the atelier or by video call: casatimilano.com