IWC
Portofino IW3910-26— lug 20mm

The IWC Portofino IW3910-26 has a lug width of 20mm. This measurement is essential for purchasing a compatible strap. To verify it, measure the distance between the spring bars that protrude from the case between the 12 and 6 o'clock positions using a caliper or metal ruler.

For Red Gold, we recommend materials that enhance the natural warmth of rose gold: alligator or crocodile in brown tones, black crocodile with a gold buckle, or textured grain calf leather. Avoid excessive color contrast. Chocolate brown alligator is the most sophisticated and versatile choice, suitable for both formal and casual settings.

Strap replacement requires extracting the spring bars from the lugs. Position the watch on a soft surface, use a small flathead screwdriver to gently compress the spring of each bar, then slide the bar out of the lug. Insert the new strap by threading the spring bars into the slots and ensuring they are fully inserted and locked.

No. A quality artisanal strap made from premium leathers can actually enhance the timepiece, allowing greater aesthetic versatility. It is important to retain the original IWC strap for formal occasions, but alternating selected leathers does not reduce the collectible value of the watch, provided the change is executed correctly.

Durability depends on the material and usage. Premium alligator or crocodile lasts 5-7 years with daily use, developing a patina that increases its character. Good quality calf leather resists 3-5 years. Factors such as humidity, perspiration, and frequency of use influence longevity. Casati Milano guarantees straps for 18 months, covering manufacturing defects and material flaws.