Strap for Portugieser Perpetual Calendar Digital Date-Month Edition "75th Anniversary" Red Gold / Blue

The lug width of the Portugieser IW3972-04 is exactly 22 millimetres. This measurement represents the distance between the two lugs of the case and is essential for selecting a compatible strap. A strap of incorrect width will not fit properly on the watch.

For a Portugieser IW3972-04 in rose gold, Nilo alligator with vegetable tanning is the most sophisticated choice: its fine and symmetrical grain creates a noble aesthetic dialogue with the precious metal's tone. Alternatively, calf leather in shell cordovan offers absolute smoothness with a honey colour that develops patina alongside the rose gold's natural ageing.

Strap replacement is accomplished by extracting the spring bar located in the internal area of the lug. Using a dedicated spring bar tool, gently push the bar inward to release it from its seat. The new strap is inserted by snapping the spring bar into the corresponding holes. Care should be taken during this operation to avoid scratching the case, particularly if it is rose gold.

Yes, any strap with a 22mm lug width is compatible with the Portugieser IW3972-04, regardless of brand. However, it is advisable to select superior quality leather and artisanal construction: a well-crafted strap in alligator, calf or shell cordovan enhances the watch and ensures durability over time.

A quality leather strap, artisanally crafted, has an average lifespan of 18-24 months with daily wear. Factors influencing longevity include frequency of use, moisture exposure, tanning type and maintenance. Vegetable-tanned leather tends to age more aesthetically, developing patina, whilst the leather structure remains stable over time if properly maintained.