Strap for De Ville Trésor Master Co-Axial Yellow Gold / Silver

The lug width of the Trésor 432.53.40.21.02.001 is 20mm. This width is determined by the geometry of the 40mm case and the historical proportions of the collection. A compatible strap must have exactly 20mm external width at the lugs, with a maximum tolerance of ±0.5mm.

For a Trésor 432.53.40.21.02.001 in yellow gold, we recommend dark missionary alligator (deep black-brown) for formal elegance, or anilina calf with vegetable tanning for a patina that ages with the case. Burgundy shell cordovan offers structural rigidity and natural brilliance ideal for evening occasions. Avoid strong contrasts: yellow gold requires tonal harmony.

The Trésor 432.53.40.21.02.001 is equipped with spring bars (small elastic pins) inside the lugs. To change the strap: 1) Obtain a spring bar tool (special lever); 2) Insert the tool tip into the small hole on the side of the lug; 3) Press gently to retract the spring bar; 4) Remove the old strap; 5) Insert the new strap (it must have 20mm width) and release the spring bar. If you are not experienced, entrust the work to a watchmaker or the Casati Milano atelier.

No, not recommended. The correct lug width is 20mm. A 22mm strap will create excessive play and risk of detachment; an 18mm strap will not fit correctly in the lugs and may damage the case. Respect the 20mm specification to ensure comfort, safety, and preserve the aesthetics of the watch.

Durability depends on the material and usage. A missionary alligator strap with vegetable tanning can last 5-7 years with regular maintenance (applying balm every 6 months). Shell cordovan resists up to 8-10 years thanks to its natural rigidity. Anilina calf requires greater care: 3-5 years with proper maintenance. Exposure to humidity, sweat, and sun shortens longevity. The Casati Milano atelier offers 18-month warranty on custom straps, with the option of leather regeneration.