Strap for Portofino Automatic Stainless Steel / Silver / Milanese

The lug width of the IWC Portofino IW3565-05 is 20 millimetres. This measurement is taken as the distance between the two spring bar attachment points on the case. A strap with an incorrect lug width will not be compatible with the watch's attachments.

For the Portofino IW3565-05, we recommend smoked alligator straps for formal wear, vegetable-tanned calf leather for everyday versatility, or shell cordovan for those seeking durability and a polished finish. Your choice depends on intended use and dial colour (silver or blue).

Strap replacement requires a spring bar tool to compress the spring mechanisms. Open the case attachments, extract the current spring bar, and insert the new one from your replacement strap, aligning the attachment holes correctly. If you prefer professional assistance, Casati Milano offers this service with a guarantee.

Yes, provided the strap has a 20-millimetre lug width compatible with the case attachments. Milanostraps offers straps manufactured to the same construction standards as originals, customisable in leather, colour, and size, with an 18-month guarantee when purchased through Casati Milano atelier.

Durability depends on material and usage: vegetable-tanned calf typically lasts 3–5 years of daily wear, whilst shell cordovan can exceed 7–10 years due to its superior density. Quality alligator offers intermediate durability of 4–6 years. Regular maintenance—cleaning and protection from extreme moisture—significantly extends strap lifespan.