Strap for Portugieser Annual Calendar Stainless Steel / Silver

The lug width of the IWC Portugieser IW5035-01 is 22 millimetres. This measurement corresponds to the internal distance between the two spring bars that secure the strap to the case lugs. Any 22mm strap will be compatible and will fit your timepiece perfectly.

The Portugieser IW5035-01 is best expressed with artisanal quality leather straps. For formal elegance, tobacco brown alligator or Italian vegetable-tanned calf leather represent the ideal choices. Alternatively, to emphasise the intrinsic sporting vocation of the model, a fabric NATO strap or a vulcanised rubber strap are equally coherent and functional options.

To change the strap, use a precision tool such as a spring bar tool. Place the watch on a stable surface, locate the elastic pin (spring bar) that connects the strap to the lug and gently press inward to compress the spring. The worn strap will lift away easily. Repeat the operation on the other side, then insert the new strap by aligning the spring bars to the lugs and verifying the final engagement.

Yes, the IWC Portugieser IW5035-01 accepts aftermarket 22mm straps perfectly. An artisanal strap from Milano Straps, whether custom-made or purchased from the standard collection for 22mm lugs, will fit without requiring any mechanical modifications. We recommend verifying that your watch's spring bars are in optimal condition before proceeding with the replacement.

The lifespan of a leather strap depends on usage intensity and material quality. A Tuscan leather strap with vegetable tanning or a good-quality alligator strap can typically last between three and five years of daily use, developing a natural patina over time. To extend the life of your strap, avoid prolonged exposure to moisture and occasionally apply a protective balm specifically designed for leather. Milano Straps' warranty covers manufacturing defects for 18 months.