Strap for De Ville Trésor Master Chronometer Yellow Gold / White Enamel

The Omega Trésor 435.53.40.21.09.001 features a 20.00mm lug width. This dimension is specific to this model and is not interchangeable with 18mm or 22mm straps. To verify, use a digital caliper to measure the width between the lugs at the narrowest point of the case.

Alligator represents the most elegant choice: its regular texture contrasts perfectly with gold without competing visually. Alternatively, dark burgundy shell cordovan or vegetable-tanned leather create sophisticated pairings that evolve naturally over time. The choice depends on your desired aesthetic: understated (black), warm (cognac), or bold (burgundy).

The strap is removed by extracting the lug pins using a spring bar tool. Position the watch so the lugs are accessible, insert the tool into the pin hole, gently depress to compress the internal spring, and slide the pin outward. Repeat on the other side. Installing the new strap follows the reverse process. If unsure, consult a professional watchmaker.

Omega fits only original straps from their own ateliers. A superior aftermarket strap, such as artisanal alligator or shell cordovan, often offers better craftsmanship than factory options. Milano Straps provides compatible straps customizable with initials, sizing, and thread color—a configuration impossible with official Omega options.

A quality leather strap, whether alligator, calf, or shell cordovan, typically lasts 3–5 years with daily wear. Longevity depends on exposure to sweat, UV rays, and humidity. Straps treated with vegetable tanning develop a patina and improve aesthetically over time. Casati Milano offers an 18-month warranty on custom straps, and replacement cost remains a fraction of the watch's value.