Strap for Portofino Automatic Red Gold / Ardoise

The lug width of the IWC Portofino IW3565-11 is 20 millimetres, measured centre to centre of the fixing holes. This dimension is fixed and determined by the geometry of the 40-millimetre case. It is essential to verify this measurement before ordering an aftermarket strap to ensure precise and stable assembly.

For a rose gold model such as the IW3565-11, an alligator strap in cognac or dark brown tones is recommended, or shell cordovan for those seeking maximum durability. Aged calf leather represents a versatile and formal alternative. The choice depends on intended use (business, evening, sports) and frequency of wear.

The strap is attached to the case via spring bars. You will need a dedicated tool—a spring bar remover—to disengage the bars from the lugs. Position the watch on a soft surface to avoid scratches, gently press the tool under the bar and slide it out of the hole. Install the new strap by reversing this procedure.

Yes, provided the lug width is exactly 20 millimetres and the fixing bars are standard (1.8 millimetre diameter, as stated in IWC specifications). Quality straps produced by specialist craftsmen guarantee complete compatibility and a finish that does not compromise the prestige of the watch.

The longevity of a leather strap depends on material and use. Quality alligator resists 4-6 years with daily wear; calf leather 2-4 years; shell cordovan can exceed 8-10 years due to material density. Proper maintenance—periodic cleaning and protection from excessive moisture—significantly extends the lifespan of any leather strap.