Strap for Portugieser Perpetual Calendar 5023 White Gold / Arije

The lug width of the IWC Portugieser IW5023-10 is 22mm. This measurement refers to the space between the two lugs (case horns) where the strap is fitted. It is important not to confuse this dimension with the total strap width at the buckle: the 22mm refers exclusively to the initial width of the strap at the lugs.

For this white gold watch with perpetual calendar complication, we recommend Mississippi alligator in midnight blue. The tight grain texture and colour that patinas towards warmer tones amplify the luminosity of the white gold without competing with the open dial. An elegant alternative is vegetable-tanned leather in medium brown, which offers versatility and a natural patina that develops over time, creating a personal visual genealogy of the watch.

Strap replacement is carried out by removing the spring bars that link the strap to the case lugs. Equip yourself with a dedicated tool (spring bar tool) or consult a professional watchmaker to avoid damage. Ensure that the new strap has a lug width of 22mm. IWC typically uses standard pins, but always verify before proceeding with the change.

Yes, any strap with a 22mm lug width is compatible with the Portugieser IW5023-10, provided the spring bars are standard (typically 1.8mm or 2.0mm diameter). Handcrafted straps from Milano Straps are constructed to 22mm specifications and available in premium leathers (alligator, calf, vegetable-tanned) with personalisation options in sizes, initials and stitching thread colours.

The durability of a leather strap depends on the species, tanning method and personal wear. High-quality artisanal alligator or calf box leather typically lasts 3-5 years with daily use; vegetable-tanned leather tends to last longer due to its harder consistency, reaching 6-7 years. Factors such as sun exposure, humidity and frequency of replacement slow ageing. Treatment with natural wax prolongs useful life.