Strap for De Ville Trésor Master Chronometer Sedna Gold / Grey Enamel

The lug width of the reference 435.53.40.21.06.001 is 20 millimetres. This measurement is essential for strap compatibility and corresponds to the distance between the two metal pins that attach the strap to the case. A 20mm strap will fit correctly only if the section that passes through the lug maintains exactly this width, without any variation of 1 millimetre in either direction.

To enhance the Sedna Gold (copper alloy at 5%) we recommend alligator leather in cognac, dark brown or burgundy tones, which amplifies the chromatic harmony with the case. Shell cordovan with vegetable tanning represents a textured and sophisticated alternative. Vegetable-dyed calf leather works well for contemporary formal contexts. We advise against rubber and NATO straps: the Trésor is a classic elegant watch that deserves noble materials.

The Trésor uses a standard pin system (straight pins without springs). Proceed as follows: position the watch so that the lugs face upward, use a dedicated spring bar tool to gently lever the pin from below, removing the old strap first. Insert the new 20mm strap onto the axes, ensuring that the pin is fully seated in both holes. Never force: correct insertion requires gentle and steady pressure.

Yes, any well-made 20mm strap is compatible with the 435.53.40.21.06.001, provided that the section passing through the lug is actually 20 millimetres and the thickness does not exceed 4.5-5 millimetres (otherwise it may not seat correctly in the Omega pins). Build quality, material choice and finish depend on the manufacturer: for this collection we recommend noble leathers crafted artisanally.

A noble leather strap (alligator, shell cordovan, quality calf) mounted on a wristwatch worn daily has an average lifespan of 3-5 years, depending on factors such as environmental humidity, frequency of use and care in maintenance. Storing the strap in dry environments, avoiding prolonged water exposure and occasionally cleaning with a soft cloth extends longevity. Artisanal straps of the highest quality, with sturdy stitching and well-aged leather, can achieve 6-7 years of regular wear.