Strap for De Ville Trésor Master Co-Axial Sedna Gold / Diamond / MOP

The lug width of the Trésor 432.58.40.21.05.001 is 20mm. This is the critical parameter for strap compatibility: the internal distance between the attachment pins must be exactly 20.00mm. Always verify with a digital caliper before purchasing an aftermarket strap.

For Sedna Gold we recommend dark grey or cognac alligator, vegetable-tanned calf in warm tones (cognac, honey), or mahogany shell cordovan. Alligator offers elegant contrast; calf develops patina over time; cordovan guarantees decade-long longevity. All are compatible with the 20mm lug width.

The strap is changed by extracting the spring bars that connect the strap to the lugs. Use a dedicated spring bar tool: insert the bifurcated tip into the lateral holes of the pin, remove the pin, detach the old strap, and install the new one by aligning the holes to the 20mm lug width. For greater security, entrust the task to a Casati Milano expert.

No, absolutely not. The lug width is 20mm and is not modifiable. 22mm straps will not fit into the case attachment pins and will damage both the strap and the case itself. Always verify lug width compatibility before purchase.

A good quality vegetable-tanned leather strap lasts 3-5 years with daily use, developing characteristic patina. Shell cordovan can reach 8-10 years. Lifespan depends on use (frequency, humidity, sun exposure) and maintenance (avoid prolonged water exposure, periodic treatments with specific creams). Casati Milano offers an 18-month warranty on its custom straps.