IWC · Portugieser

Strap for Portuguese Automatic Stainless Steel / Silver

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
Lug width22 mm
Case diameter42 mm
ReferenceIW5001-08 (aka: IW500108)
FamilyPortugieser
MovementIWC caliber 51011 hours, minutes, small seconds | date | power reserve indicator
Year2004 - 2015
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Portugieser IW5001-08 (aka: IW500108)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Portugieser IW5001-08 (aka: IW500108), seen from the bench

The IWC Portugieser IW5001-08 is an automatic stainless steel watch with a 42.3 mm case, featuring the IWC 51011 caliber. This model maintains the original 1939 design philosophy of nautical reliability combined with understated elegance. The watch has a white dial, rhodium-plated Dauphine hands, applied indices, and essential functions including hours, minutes, small seconds, and date. The 22 mm lug width accommodates a proportionate strap without excess material.

Frequently asked questions

What is the lug width of the IWC Portugieser IW5001-08?

The lug width of the IWC Portugieser IW5001-08 is 22 millimetres. This measurement represents the distance between the two spring bars that connect the strap to the case. It is a standard reference in the aftermarket strap market and compatible with many other classic timepieces.

Which strap is the best choice for the Portugieser IW5001-08?

There is no universally "best" strap, as it depends on intended use and aesthetic preferences. Mississippi alligator is the most elegant and versatile choice, with a fine grain that complements the dial's minimalism perfectly. Vegetable-tanned calf leather offers natural softness, whilst shell cordovan develops an authentic and profound patina over time. For informal or sporting contexts, rubber or NATO fabric options provide practicality without compromising the case's proportional balance.

How do you change the strap on the Portugieser IW5001-08?

Strap replacement is straightforward and requires no watchmaking expertise. Obtain a spring bar tool or a small flathead screwdriver. Hold the watch steadily, insert the tool into the small groove beneath one of the attachment pins and gently press to compress the internal spring. The pin will slide from its housing. Repeat on the opposite side. Insert the new strap's pins into the same slots. The entire operation takes less than three minutes with no specialist equipment required.

Is an aftermarket strap compatible with the Portugieser IW5001-08?

Yes, any strap with a 22-millimetre lug width is compatible with the Portugieser IW5001-08. Always verify the measurement before purchase by measuring from the inner part of the lug with a calliper or ruler. Generic aftermarket straps may suffer from inferior construction quality and finishing; artisanal custom-made straps guarantee instead aesthetic and tactile coherence with the timepiece's value.

How long does a leather strap last on the Portugieser IW5001-08?

Longevity depends on leather quality, daily use intensity and environmental conditions. A high-quality alligator or cordovan strap, used with care, may last 3–5 years with intensive wear, or considerably longer if reserved for formal occasions. Calf leather tends to wear more quickly, especially if exposed to prolonged humidity and perspiration. Regular maintenance—cleaning with a dry cloth, protection from direct sunlight—significantly extends strap lifespan.

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