Strap for Portofino Hand-Wound Monopusher Platinum / Laureus Charity Night Milano 2015

The lug width of the IWC Portofino IW515106 is 22 millimetres. This dimension is standard for Portofino chronographs of this generation and determines which strap is compatible with the case. To verify the measurement, position a ruler between the inner lugs and measure the vertical distance.

For the Portofino IW515106 in platinum, the finest straps are African alligator, which enhances the refinement of the metal, or vegetable-tanned calf, which develops authentic patina over time. If you prefer daily versatility, high-grade rubber offers grip and functionality without compromising the watch's aesthetic identity.

To change the strap, specific tools are required: a spring bar tool that allows you to press the anchor pins connecting the strap to the case. It is recommended to work on a flat, stable surface, taking care not to damage the platinum case. If you prefer to avoid risk, the Casati Milano atelier offers professional changing service.

Yes, aftermarket straps with a 22mm lug width are fully compatible with the Portofino IW515106. However, ensure the strap is made from quality materials — certified alligator, fine calf, structured rubber — so it stands comparison aesthetically and functionally with a platinum 950 case.

A premium leather strap (alligator or calf) typically lasts 3-5 years with daily wear, depending on exposure to humidity, sunlight and mechanical wear. Vegetable tanning tends to age better visually, developing patina. The Casati Milano atelier guarantees 18 months of durability on bespoke straps, with the possibility of regeneration and replacement.