Strap for Portugieser Automatic 40 Stainless Steel / Silver - Blue / Alligator

The lug width of the Portugieser IW3583-04 is 20 mm. This width is designed by IWC to maintain the correct visual proportion with the 40.40 mm case, ensuring aesthetic stability and compatibility with straps manufactured to the 20 mm standard.

The optimal strap depends on intended use: for formal contexts, vegetable-tanned alligator or tanned calf leather amplify the classical character; for sustained performance, FKM rubber provides moisture resistance; for summer versatility, cotton serge NATO offers practicality whilst maintaining aesthetic dignity. Your choice reflects the temporal register in which you wear the watch.

Use a spring bar removal tool, inserting it into the lateral grooves of the lug. Apply gentle pressure to compress the internal spring mechanism, extracting the pin outward. Repeat for both extremities. Align the new strap's pins with the grooves, pressing until the security click engages.

Yes, any strap manufactured for 20 mm lugs is compatible with the IW3583-04. The milanostraps.it artisanal straps offer customisation in sizing, premium leathers (alligator, shell cordovan, calf), and finishes, ensuring constructive integration with your timepiece.

A finely tanned leather strap typically lasts 3-5 years under daily wear, varying according to frequency of use, ambient humidity, and maintenance. Leather requires periodic air-drying and protection from stagnant water. milanostraps.it artisanal straps include 18-month warranty and repair services.