Strap for Portugieser Perpetual Calendar 5023 Red Gold / Arije

The lug width of the IW5023-09 is 22mm. This dimension is specific to this model and represents the ideal proportioning for a case diameter of 44.2mm. Precise measurement is essential: use a digital caliper by measuring from the inner side of one lug to the other to verify compatibility with aftermarket straps.

Alligator is the traditional choice for the Portugieser IW5023-09: the natural grain creates discrete texture and the fiber resists repeated flexing. Alternatively, shell cordovan develops an evolved patina over time in deep tones, creating an aesthetic connection with the rose gold's patina. Vegetable-tanned calf leather is a sustainable choice that develops chromatic character over the years.

Changing the strap on the Portugieser IW5023-09 requires a quality spring bar tool. Position the watch with the lugs facing upward, gently insert the spring bar tool into the side opening of the lug, lift to release the internal spring, remove the previous strap and insert the new one in line with the spring, ensuring that the engagement click is crisp. If you are not experienced, the Casati Milano atelier offers strap replacement with a guarantee on compatible materials.

Compatible 22mm straps must meet precise construction quality standards to avoid compromising the elegance of the rose gold case. We recommend noble materials: fine-grain alligator, shell cordovan, vegetable-tanned calf leather. Avoid shiny silicone or synthetic straps: artificial reflectivity contrasts with the materiality of rose gold. Milanostraps offers a curated selection of customizable 22mm straps made to measure.

A fine leather strap (alligator, cordovan, calf) on a regularly worn watch typically lasts 3-5 years, depending on frequency of use and environmental conditions. Vegetable-tanned leather develops visible character in the first 6-12 months. Artisanal straps from Casati Milano include an 18-month warranty and future regenerations. Factors of accelerated wear: chronic perspiration, prolonged direct sun exposure, aggressive creasing during overnight rest.