Strap for Portugieser Chronograph "150 Years" Stainless Steel / White

The lug width of the IWC Portugieser IW3716-02 is precisely 20 mm, measured from the centre of one spring bar pin to the centre of the other. This dimension is model-specific and cannot be interchanged with 19 mm or 22 mm lugs without risk of permanent distortion to the watch case.

For formal daywear, a cognac alligator strap delivers understated elegance against the black dial. Vegetable-tanned calf leather develops a rich patina over time. For marine use or water sports, a nylon NATO with FKM rubber inner pad honours the Portugieser's maritime heritage. Minimalist wearers favour FKM rubber for chemical resistance and zero ageing.

Use a spring bar tool: gently depress the spring bar from the underside, extract the pin from the lug, remove the old strap, position the new strap on both lugs, reinserter the spring bar until it clicks into place. Avoid striking the case directly.

Absolutely, provided the lug width is exactly 20 mm. Artisanal aftermarket straps from milanostraps.it are engineered to identical structural specifications as factory straps, with compatible thickness and rigidity to accommodate IWC spring bar pins.

A quality leather strap—alligator, calf, or shell cordovan—lasts 5–7 years under daily wear with proper maintenance (monthly cleaning, neutral leather cream). Rubber straps endure 10+ years; NATO nylon exceeds 10 years. Durability depends on humidity exposure, temperature fluctuation, and perspiration contact.