Strap for Portuguese Chrono-Automatic Stainless Steel / Silver

The IWC Portugieser IW3714-17 features a lug width of exactly 20mm. This measurement is specific to this model and represents the distance between the two lugs (case attachments) where the strap connects. You can verify this using a digital calliper by measuring between the inner edges of both lugs. This 20mm dimension was precisely engineered by IWC to maintain optimal proportions relative to the 40.90mm case diameter.

The optimal choice depends on your intended use and aesthetic preferences. For classical elegance, we recommend natural alligator or vegetable-tanned calf leather in cognac, tan, or brown tones: these materials enhance the Portugieser's maritime heritage and develop a beautiful patina with time. For long-term investment, shell cordovan (horse butt leather) is unmatched for density and longevity, offering exceptional durability and character development. For sports or coastal use, brushed FKM rubber ensures reliability in humid or salt-laden environments whilst maintaining excellent tactile comfort.

The IWC Portugieser IW3714-17 uses a standard spring bar attachment system. To change the strap, you will require a spring bar tool (sometimes called a strap removal tool). Gently compress and remove the spring bar from the upper lug, withdraw the old strap, then insert the new strap by threading the spring bars through both lugs. Ensure both bars are fully seated and the strap sits symmetrically on the case. If you prefer professional assistance, the Atelier Casati Milano can perform this service by appointment.

Yes, any strap with a 20mm lug width is fully compatible with the IWC Portugieser IW3714-17. Compatibility depends exclusively on lug width: provided your strap features 20mm lugs, it will function perfectly. Milanostraps.it offers an extensive selection of 20mm artisanal straps available in multiple materials (alligator, calf, shell cordovan, rubber) and customisable in length, initials, and stitching colour.

Leather strap longevity depends on material quality and usage conditions. Premium calf or alligator leather, worn daily, maintains functionality and aesthetic appeal for 4–6 years before requiring buckle restoration or replacement. Shell cordovan can last 8–10 years thanks to its natural density and resistance to wear. Vegetable-tanned leather, if properly maintained and gradually exposed to moisture, actually improves with age, developing a rich patina. Milanostraps.it guarantees 18 months on all atelier-crafted straps, covering manufacturing defects and leather quality issues.