Strap for Portugieser Chronograph Stainless Steel / Silver - Blue / Bracelet

The IWC Portugieser IW3716-17 features a lug width of 20 millimetres. This measurement represents the distance between the two spring bars of the case and determines the width your strap must be. A compatible strap should measure between 19.8 and 20.2 millimetres to ensure perfect fit without vertical play.

The best strap depends on usage and colour preference. For formal elegance, we recommend natural alligator in close grain (black, seal brown) with a stainless steel deployant buckle. For those seeking historical patina and character: shell cordovan, which darkens over time. For sportive use or aquatic environments: technical FKM rubber or NATO in a tone complementary to the dial. Vegetable-tanned calf offers the finest compromise between softness, breathability and environmental certification.

Obtain a spring bar tool (spring-loaded button or flat screwdriver). Position the watch with the strap facing upward. Gently press the lower pin downward to release it from its seat in the case. Remove the old strap. Insert the new strap's pin first into the upper lug, then press the lower pin into its correct position. Verify there is no vertical play. This procedure requires patience: never force the case.

Yes, provided the strap respects the 20 millimetre lug width and the pin diameter (1.8 millimetres). Handcrafted straps in alligator, shell cordovan and calf from specialist manufacturers are entirely compatible and often exceed the quality of original IWC straps. Compatibility concerns not only physical dimensions but also the robustness of stitching (minimum 0.5 millimetres) and the solidity of the anchor heads at the pins.

Lifespan depends on material and usage. Natural alligator: 5–7 years with daily wear, as the leather is dense and wear-resistant. Shell cordovan: 6–10 years due to its compact and naturally water-resistant nature. Vegetable-tanned calf: 3–5 years for daily use, less durable but more environmentally friendly. Technical rubber: 5–8 years if not exposed to prolonged direct UV rays. Hand-stitched seams with waxed thread (minimum 1.5mm) are the first element to fail; timely repair can double a strap's lifespan.