Strap for Portofino Automatic Yellow Gold / Champagne / Bracelet

The lug width of the IWC Portofino IW9251-02 is 18 millimetres. This dimension is specific to the model and must be verified by measuring the internal distance between the two spring bar pins that connect the case to the strap. It is not compatible with standard 16mm or 20mm straps.

The optimal strap depends on intended use: for formal elegance, a dark brown alligator with polished finish creates aesthetic contrast against the gold. For visual evolution over time, black shell cordovan develops towards a brownish-violet patina after twelve months. For daily wear, vegetable-tanned calf acquires natural creasing. All combinations are available bespoke from Casati Milano atelier.

Strap replacement requires a spring bar tool to extract the lug pins. Position the watch on a flat surface, identify the two horizontal pins passing through the lugs, insert the tool into the pin slots while pushing inward, and remove the existing strap. Reverse the procedure with the new strap, ensuring the pins are fully seated within the lugs. If inexperienced, consult an authorised retailer.

Yes, provided the lug width is exactly 18 millimetres. Many aftermarket straps do not meet this specification, so technical verification is essential. Bespoke straps created by Casati Milano guarantee complete compatibility and offer personalisation in leather type, colour, and stitching thread.

A high-quality leather strap—alligator, shell cordovan, or vegetable-tanned calf—has an approximate lifespan of 3–5 years under daily wear, extending significantly with occasional use. Longevity depends on leather type, maintenance (avoiding prolonged moisture exposure), wear frequency, and climate conditions. Casati Milano straps carry an 18-month guarantee and can be renewed while maintaining the same aesthetic specification.