Strap for De Ville Trésor Tourbillon Sedna Gold / Black

The lug width of the Trésor 529.53.43.22.01.001 is 21 millimetres. This width is specific to large cases (43mm) and requires straps built to precise specifications. Measuring correctly means placing the calliper between the internal lugs: it is the first step in choosing a compatible strap without errors.

For the Trésor in Sedna Gold, we recommend alligator in cognac tones (fine grain amplifies the warmth of rose gold), vegetable-tanned calf leather in brown for those who love natural patina, or shell cordovan in burgundy for evening wear. For water activities, vulcanised FKM rubber in black maintains readability and protection. Each choice is semantically tied to the watch.

Strap replacement is done by removing the internal spring bars with a dedicated tool (spring bar tool) and inserting those of the new strap into the lugs. On the 43mm Trésor with 21mm lug width, the geometry of the lugs requires precision: the strap must fit snugly, otherwise aesthetic cohesion is compromised. If you are not experienced, entrust the change to a specialised atelier.

Yes, but with care. Only straps built specifically for 21mm lug width are compatible. Online you will find several options already in inventory (alligator, calf, cordovan, rubber) ready for shipment. For more refined customisations, the Casati Milano atelier creates bespoke straps with personal choice of leathers and 18-month warranty.

A quality leather strap (alligator or vegetable-tanned calf) lasts between 3 and 5 years with moderate daily wear, while shell cordovan can exceed 7–8 years thanks to the natural density of the material. Wear depends on wearing habits, humidity, perspiration and maintenance. A vulcanised rubber strap resists longer (8–10 years) if protected from excessive sunlight. The patina that forms over time is a sign that the strap has a history.