Omega
De Ville 424.13.40.20.06.001 (aka: 42413402006001)— lug 20mm

The lug width of the De Ville ref. 424.13.40.20.06.001 is 20 mm. It is measured perpendicularly between the inside of the two lugs, from the dial side. This dimension is specifically calculated in proportion to the 39.50 mm case diameter, so any strap must respect exactly 20 mm to guarantee proper fit without stress on the lugs.

Alligator remains the most natural choice: the vertical grain creates contrast with the linear geometry of the lugs, and the patina that develops over time adds depth. Vegetable-tanned calf offers natural texture and elegant aging. Shell cordovan, for water resistance and inherent luster, is ideal for those seeking versatility. NATO canvas remains a technical option for everyday wear.

Remove the current strap using a spring bar tool, gently pushing the pin toward the center of the case from one side, thereby releasing the spring bar. Do the same from the other side. Insert the new strap by positioning the spring bar pin in the left lug, then flex slightly to engage completely. Repeat the same procedure on the right side, ensuring the pin is securely seated in the lugs.

Yes, provided the strap is precisely 20 mm lug width. Artisanal aftermarket straps, made with superior materials such as alligator, vegetable-tanned calf, or shell cordovan, often offer construction quality and aesthetic choice superior to original Omega straps. It is important to always verify measurement compatibility and the solidity of strap lug construction.

A quality leather strap (alligator, natural calf, shell cordovan) typically lasts 2–4 years with daily wear, provided it is maintained correctly: avoid prolonged water immersion, protect it from direct heat sources, and occasionally apply a natural conditioner. Longevity depends on intensity of use, climate, and personal care. A well-made strap develops patina over time but remains structurally sound for at least 3–5 years.