Strap for Portofino Automatic / Stainless Steel / White / Bracelet

The lug width of the IWC Portofino IW3513-18 is 18 millimetres. This measurement is fixed and represents the distance between the two lugs where the strap attaches to the case. It is essential to verify this dimension before purchasing an aftermarket strap to ensure perfect compatibility.

Alligator leather in cognac or black is the most elegant choice for this model, thanks to its refined cross-grain texture that complements the silvered opaline dial. Vegetable-tanned calf leather is an excellent alternative for those who appreciate a strap that develops a natural patina over time. For informal contexts, burgundy shell cordovan or a technical FKM rubber strap offers durability without aesthetic compromise.

To change the strap, use a dedicated spring bar tool or a small flathead screwdriver. Carefully remove the spring bars from the case lugs, taking care not to scratch the stainless steel case. Insert the new spring bars into the new strap, then position the strap under the lugs and press the spring bars until they lock securely. Verify that the attachments are firmly fixed before wearing the watch.

Yes, any strap with an 18-millimetre lug width is compatible with the IW3513-18. High-quality artisanal straps offer customisation options (length, material, colour, buckle type) that original straps do not allow. MilanoStraps offers an extensive selection of 18mm straps in premium leather, shell cordovan and technical rubber, all perfectly adaptable to your aesthetic preferences.

A high-quality leather strap, such as alligator or shell cordovan, lasts approximately 2-4 years with daily wear. Longevity depends on exposure to water, perspiration and sunlight. A vegetable-tanned calf strap ages visibly, developing an authentic patina over time, whilst maintaining functionality for up to 3-5 years. Seasonal rotation (alternating straps) significantly extends the lifespan of each strap.