Strap for Portofino Automatic 150 Years Stainless Steel / Blue

The lug width of the IWC Portofino IW3565-18 is exactly 20.00mm. This measurement represents the distance between the two suspension pins of the case and determines strap compatibility. Measuring it correctly ensures you purchase a strap that fits your case perfectly.

The Portofino IW3565-18 pairs elegantly with straps in black alligator, vegetable-tanned calf leather (cognac, burgundy, black tones), shell cordovan, and woven NATO fabrics. Alligator imparts classical formality, vegetable-tanned calf develops patina over time, shell cordovan offers intense lustre. Your choice depends on context of use and personal aesthetic preference.

Strap replacement requires a specific tool (spring bar tool). Insert the tool's tip into the indent of the suspension spring until it clicks, then carefully extract the old lug. Align the new strap's lugs with the case holes and allow the spring to click into place. Avoid forcing: the lugs are precisely engineered. If uncertain, consult a watchmaker or Casati Milano atelier.

Yes, any strap with a 20mm lug width is compatible with the IWC Portofino IW3565-18. Artisanal aftermarket straps offer superior construction quality compared to factory straps, allowing you to personalise your watch completely. Always verify the strap is true 20mm before purchase.

A quality artisanal leather strap lasts approximately 3-5 years with daily use, provided proper maintenance. Leather must remain dry, protected from excessive heat and prolonged direct sunlight exposure. Shell cordovan straps may last longer due to their natural compactness. Vegetable-tanned straps require more initial care but stabilise as patina develops.