Omega · De Ville
Strap for De Ville Prestige Co-Axial 39.5 Stainless Steel / Yellow Gold / Silver Sunburst
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the De Ville 424.23.40.20.02.004
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€149
Red Alligator Strap Water Resistant€195
Green Rubberized Alligator Strap with Ecru Tribal Stitching€149
Hammered Calfskin Strap Light Blue€98
Vintage Olive Green Calf Leather Watch Strap€80
The De Ville 424.23.40.20.02.004, seen from the bench
Frequently asked questions
What is the lug width of the De Ville 424.23.40.20.02.004?
The lug width of the Omega De Ville 424.23.40.20.02.004 is 20 millimetres. This measurement is taken by placing a calliper between the inner lugs of the case. Always verify this dimension before ordering an aftermarket strap, as a different lug width would result in incompatibility and mechanical play.
Which strap is best suited for the two-tone gold and steel De Ville?
For the two-tone De Ville 424.23.40.20.02.004, we recommend a tobacco brown or dark brown alligator leather, which enhances the yellow gold and creates colour coherence. Alternatively, a smooth black calf leather for a more contemporary effect, or shell cordovan for those preferring artisanal character. The choice depends on primary use: formal elegance (brown alligator), everyday versatility (black rubber), long-term investment (vegetable-tanned calf).
How do you change the strap on the De Ville 424.23.40.20.02.004?
The strap on the De Ville 424.23.40.20.02.004 is changed by removing the spring bars. Use a spring bar remover tool, position it perpendicular to the spring bar, and gently press to release the internal spring. The new 20mm strap is inserted simply by aligning the holes and reinserting the spring bars. If uncertain, consult a qualified watchmaker to avoid damage to the case.
Can I use a compatible 20mm aftermarket strap on this Omega?
Yes, any strap with a 20mm lug width is mechanically compatible with the De Ville 424.23.40.20.02.004. However, the choice of material quality is decisive: superior leather (genuine alligator, shell cordovan, high-grade calf) ensures durability, natural patina, and aesthetic coherence with the watch's value. On milanostraps.it you'll find 20mm straps customizable with choice of leather, size, initials, and stitching thread.
How long does a leather strap last on a daily-worn watch?
A quality leather strap, with vegetable tanning or genuine alligator, typically lasts 4–6 years of daily use, with variability depending on climate, humidity, and cleaning frequency. Shell cordovan straps tend to last longer thanks to fibre density. A leather treated with protective wax and periodically cleaned with a soft damp cloth significantly extends its lifespan. The Casati Milano atelier offers an 18-month warranty and can replace the strap while preserving the original buckle.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

