Strap for Da Vinci Perpetual Yellow Gold / White / French / Bracelet

The lug width (also called ansa width) of the IWC Da Vinci IW9252-04 is 19 millimetres. This measurement represents the distance between the inner points of the watch case lugs. It is a specific dimension and is not compatible with standard off-the-shelf straps in 18mm or 20mm. To verify the correct measurement, position a digital calliper perpendicular to the lugs at the widest point where the strap sits.

Alligator leather is the most coherent choice for this model, as its fine grain perfectly complements the elegance of the yellow gold case. Alternatively, vegetable-tanned calf leather offers a patina that ages gracefully and creates a personal bond over time. The ideal leather thickness is between 1.3 and 1.5mm to ensure fluidity at the wrist without excessive stiffness. Shell cordovan is not recommended: its initial rigidity contrasts with the discrete elegance of this timepiece.

To change the strap, you will need a spring bar removal tool. Locate the small lateral holes on the lugs, insert the tool to compress the internal elastic pin, and slide the old strap outward. Repeat on the opposite lug. Subsequently, insert the new strap, ensuring that the spring bar is correctly seated in both lugs. If you are uncertain, consult a qualified watchmaker or visit the Casati Milano atelier for professional installation.

Yes, any strap with a 19-millimetre lug width is compatible with the IW9252-04. However, construction quality varies significantly in the aftermarket. Artisanal straps made from premium leather (alligator, high-quality calf) guarantee superior longevity and aesthetic evolution compared to standardised industrial products. On milanostraps.it you will find a selection of customisable 19mm straps, or you can request a bespoke creation from the Casati Milano atelier.

Durability depends on leather quality, frequency of wear, and climate conditions. An artisanal alligator or vegetable-tanned calf strap lasts an average of 3–5 years with daily use, with peaks of up to 7 years if worn occasionally. Leather ages naturally, developing patina and subtle signs of wear that enhance its character. Industrially produced straps typically have shorter lifespans (18–36 months). The Casati Milano atelier offers an 18-month warranty and provides maintenance services to extend the strap's useful life.