Strap for Portofino Automatic Stainless Steel / White - Railroad / Strap

The lug width of the IWC Portofino IW3513-38 is 18mm. This is a specific measurement that requires straps compatible with this exact width. Always verify the technical specification in your IWC warranty manual before ordering a strap.

For the 34mm Portofino we recommend dark brown alligator for formal occasions, vegetable-tanned calf for daily wear, or shell cordovan for a durable mid-range solution. Cotton NATO is ideal for sports-casual contexts. The choice depends on the occasion and the desired color contrast with the white dial.

Strap replacement requires a thin-blade screwdriver or a dedicated strap removal tool. Locate the lugs at the ends of the case, insert the tool into the small hole on the lugs, apply gentle pressure to release the internal spring bar and extract the lug. Repeat on the other side. Proceed in reverse to install the new strap.

No, the 18mm strap of the Portofino IW3513-38 is compatible exclusively with watches that feature the same 18mm lug width. It cannot be used on models with 16mm, 20mm or other width lugs. Always verify your watch specification before purchasing a strap.

A quality leather strap with vegetable tanning has an average lifespan of 3-5 years in daily use, with the possibility of extending to 7-8 years with proper maintenance (gentle cleaning, protection from excessive sweat and humidity). Alligator tends to last longer due to the more compact skin structure. The Casati Milano warranty on artisanal straps is 18 months.