Strap for Portugieser Annual Calendar Stainless Steel / Pisa

The lug width of the Portugieser IW5035-07 is 22mm. This dimension is determined by the proportion between the 44.2mm case and the lugs, calculated to ensure aesthetic balance and wearing comfort. Always measure with a digital calliper perpendicular to the lugs, net of spring bars, to ensure you order the correct size.

The ideal strap depends on the occasion and personal preference. For formal wear, alligator in vegetable tanning or shell cordovan are the most refined choices. Rubber-lined calf is versatile and comfortable for daily wear. For a sportier aesthetic, a canvas or rubber strap with deployante remains authentic to the watch's instrumental heritage. Cognac alligator in vegetable tanning creates a sophisticated contrast with the brushed stainless steel.

The change is made by removing the spring bars that secure the strap to the case lugs. Use a spring bar tool to compress the pin and slide it gently out of the lug hole. Once the old strap is free, insert the new one by aligning the holes with the spring bars and pressing until you feel a click. Ensure the lug width is exactly 22mm to avoid excess play or friction.

Yes, any strap with a 22mm lug width is compatible, provided the width is measured correctly net of the spring bars. However, the construction quality of the aftermarket strap determines longevity and comfort. Bespoke straps made with premium leather (alligator, shell cordovan, aniline calf) guarantee artisanal finishing that enhances the value of the watch, whilst low-cost industrial straps risk compromising the wearing experience.

Durability depends on the tanning method, usage and maintenance. An alligator or shell cordovan in vegetable tanning, if worn moderately (3-4 days per week), can last 3-5 years before showing signs of wear. Aniline calf has a slightly shorter lifespan (2-4 years) due to leather porosity. Vegetable tanning allows the strap to develop a noble patina, whilst industrial chrome tanning tends to deteriorate visibly. Periodic maintenance (cleaning with a soft cloth, gentle conditioning) significantly extends the strap's life.