Strap for Portofino Automatic / Stainless Steel / Black / Strap

The lug width of the IWC Portofino IW3533-05 is 20 millimetres. This dimension must be respected exactly to ensure compatibility with the strap: any deviation, however minor, would result in unstable or impossible attachment. To verify, measure the distance between the two lugs where the strap inserts.

Alligator leather represents the most refined and aesthetically superior choice: the regular grain of alligator leather creates perfect visual balance with the stainless steel case, and the natural patina improves over time. Vegetable-tanned calf leather is a conscious alternative for those preferring traditional and transparent tanning methods. FKM rubber remains the solution for sports use, although the Portofino is conceived for elegant occasions.

The strap is removed using a specific spring bar tool. Position the watch with the lug facing you, insert the lever under the spring bar from the bottom, apply gentle pressure and the bar will click out. Repeat on the other side. To reinstall, align the lug holes with the spring bars and press until you hear a distinct click.

No, changing the strap does not void the IWC warranty. However, it is advisable to use straps manufactured to elevated quality standards to avoid damage to the watch lugs. Artisanal bespoke straps from Casati Milano guarantee constructive precision and materials backed by an 18-month warranty, offering a conscious and reversible choice.

An artisanal alligator or calf leather strap maintained properly (dried after water contact, kept away from continuous direct sunlight) has a lifespan of 3-5 years under daily use conditions. The patina that develops is part of the natural beauty of the leather. Common synthetic laminates last 1-2 years; FKM rubbers last 2-3 years.