Strap for Master Collection 40 Date Stainless Steel / Silver-Arabic / Alligator

The lug width is 21 millimetres. This measurement represents the distance between the two lugs that attach the strap to the case. It is measured precisely using a digital calliper positioned on the inner surface of the lug. The 21 mm dimension allows for a broad selection of aftermarket and bespoke straps whilst maintaining balanced proportions with the 40 mm case.

For the Master Collection L2.793.4.78.3, a dark brown alligator strap is recommended for formal occasions, as the natural scute texture enhances the sobriety of the dial. A vegetable-tanned calf strap in cognac or brown tones is ideal for daily wear, as it develops a natural patina over time. For informal sporting occasions, a natural rubber strap offers practicality without compromising the elegance of the stainless steel case.

To change the strap, carefully remove the lugs using a dedicated tool (spring bar tool) to push the lateral pins. Position the new strap by aligning the holes with the pins and secure the lugs again, ensuring the strap is taut and symmetrical. If you lack experience, it is advisable to consult a professional watchmaker or a specialist atelier such as Casati Milano to avoid scratches on the case.

Yes, any strap with a 21 mm lug width is compatible with the L2.793.4.78.3. Aftermarket straps in leather (alligator, calf, shell cordovan) or rubber offer complete personalisation compared to the original strap. Ensure that the strap is constructed with precise tolerances and that the pins are stainless steel to prevent oxidation over time.

A quality leather strap for the L2.793.4.78.3 typically lasts between 3 and 5 years with daily wear, depending on the material (alligator and shell cordovan are more durable) and maintenance. Vegetable tanning extends durability due to the robustness of the production process. To extend the strap's lifespan, avoid prolonged exposure to direct moisture and occasionally apply a conditioner specific to leather. Casati Milano atelier offers an 18-month warranty on bespoke straps.