Strap for De Ville X2 Co-Axial 35 Big Date Red Gold / Black

The lug width is exactly 18mm. This width is specific to the 7713.50.31 model and allows you to match artisanal straps with precision. To verify, measure the distance between the spring bar attachments: it must be 18mm between the inner left edge and the inner right edge of the lug.

For a dress watch in rose gold like the De Ville 7713.50.31, we recommend alligator in dark shades (black, dark brown, burgundy) for maximum formality, vegetable-tanned calf for sustainability and patina evolution over time, or shell cordovan for uniqueness and durability. Avoid overly casual materials if you wish to maintain the classical identity of the model.

Remove the original bracelet by sliding the spring bars (small horizontal metal pins in the attachments). Use a spring bar tool or small flat screwdriver to push the pin downward, releasing the upper lug. Insert the new 18mm strap in the same position, ensuring that the spring bars are fully locked in place. If not confident, entrust Casati Milano for professional installation.

No, the 18mm lug width limits compatibility to watches that have exactly the same distance between attachments. The De Ville 7713.50.31 is not interchangeable with watches that have 16mm, 20mm, or other lug widths. Always verify the lug width before purchasing an aftermarket strap.

An artisanal leather strap (alligator, calf, shell cordovan) lasts on average 3-5 years with daily wear, depending on frequency of use, exposure to sweat, and maintenance. The warranty offered by Casati Milano is 18 months. To prolong the life, avoid prolonged exposure to salt water and apply leather conditioner every 6-8 months. A rubber or technical fabric strap resists 5-7 years under normal conditions.