Strap for Portugieser Chronograph Stainless Steel / Green

The lug width of the Portugieser IW3716-15 is 20mm. This measurement is taken between the two metal pins that attach the strap to the case. Any 20mm strap is compatible with this model without structural modifications.

The best choice depends on usage: for formal occasions, an alligator with tight grain and natural patina amplifies chronograph elegance. For visible ageing, vegetable-tanned calf leather is superior. Cognac shell cordovan offers seasonal versatility. In humid climates, vulcanised rubber with contrasting stitching ensures grip and durability without aesthetic compromise.

Position the watch with the case facing upward. Using a spring bar tool with a flat tip, push the pin from the underside upward to create space for removing the old strap end. Repeat on the other side. To insert the new 20mm strap, align the holes with the lugs and push the pins until they click into position. Verify both attachments are secure before wearing the watch.

Yes, any 20mm aftermarket strap is physically compatible. However, quality varies widely: choose natural leathers (alligator, calf, shell cordovan) subjected to vegetable tanning, with natural thread stitching. Avoid cheap synthetics, which age poorly and degrade rapidly. Straps from specialised ateliers guarantee longevity and elegant patina development.

A high-quality natural leather strap, vegetable-tanned, lasts 3-5 years with moderate daily use. Calf softens progressively; alligator develops deep patina; shell cordovan ennobles in colour. Durability depends on humidity, water contact and cleaning frequency. Atelier Casati Milano offers 18-month warranty with full restoration options.