IWC · Portofino

Strap for Portofino Automatic Stainless Steel / Silver

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
Lug width20 mm
Case diameter39 mm
ReferenceIW3563-07 (aka: IW356307)
FamilyPortofino
MovementIWC caliber 35110 hours, minutes, seconds
Year2009 - 2010
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 Portofino IW3563-07 (aka: IW356307)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Portofino IW3563-07 (aka: IW356307), seen from the bench

The Portofino represents IWC's dress watch line characterized by classic lines and essential hour, minute and second functions. It houses the IWC 35110 caliber with central hour, minute and second indication. The reference IW356307 features 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Portofino IW3563-07?

The lug width of the Portofino IW3563-07 is 20mm. This measurement refers to the distance between the two lateral lugs where the strap is inserted. Verify this measurement directly on your case to ensure compatibility with any aftermarket strap.

What is the best strap for the Portofino IW3563-07?

The choice depends on your usage and aesthetic preference. For formal elegance, we recommend Mississippi alligator in vegetable tanning or shell cordovan. For daily versatility, polished calf leather with a deployant clasp is an excellent solution. The critical factor is superior construction quality and precise stitching, ensuring the strap does not compete with the dial's purity.

How do I change the strap on the Portofino IW3563-07?

Strap changing requires a small nylon lever and careful handling. Position the watch in a stable holder, insert the lever into the small internal hole of the lug, and gently push the lateral pin outward. Once extracted, the strap separates easily. Repeat on the opposite side. Reinsert the pin through the new strap, aligning the holes, and press until you hear the locking click.

Is the Portofino IW3563-07 compatible with 20mm aftermarket straps?

Yes, the Portofino IW3563-07 is fully compatible with 20mm aftermarket straps. Always verify the exact lug width on your case to account for regional or manufacturing variations. On milanostraps.it you will find a curated selection of 20mm straps already verified for compatibility with this IWC reference.

How long does a leather strap last on a watch like the Portofino?

A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) worn daily lasts approximately 4-6 years before replacement is necessary. Longevity depends on frequency of use, climate conditions (humidity reduces lifespan), and regular maintenance. A strap protected from prolonged direct sunlight and cleaned periodically with a soft dry cloth maintains elasticity longer.

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