Omega · De Ville
Strap for De Ville Co-Axial 41 Chronoscope Stainless Steel / Bracelet / Black
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 4550.50.00 (aka: 45505000)
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 4550.50.00 (aka: 45505000), seen from the bench
Frequently asked questions
What lug width does the Omega De Ville 4550.50.00 have?
The Omega De Ville 4550.50.00 is fitted with a lug width of exactly 20mm. This dimension is not standard in the aftermarket strap market, as most straps are available only in 18mm or 22mm sizes. It is essential to verify this measurement before purchasing a replacement strap, by measuring the external distance between the two spring bars that connect the strap to the case.
What is the best strap material for this Omega De Ville?
For a De Ville 4550.50.00, alligator leather remains the ideal choice: the fine and regular grain amplifies the formal elegance of the design, while colours such as black, dark brown or cordovan create maximum contrast with the lacquered dial. Alternatively, vegetable-tanned calf leather offers character and evolving patina over time, particularly in havana or warm brown tones.
How do you change the strap on an Omega De Ville 4550.50.00?
The strap is changed by removing the two spring bars that secure the strap to the case lugs. Using a dedicated tool (spring bar tool), gently press the spring bar to release the internal spring, then withdraw the old strap. The new strap is inserted by aligning the holes with the spring bars and pressing until you hear the locking click. There is no need to disassemble the case or use professional tools.
Can an aftermarket 20mm strap be used on this model?
Yes, provided it is verified that the lug width is indeed 20mm. The Omega 4550.50.00 accepts straps from different brands (Hirsch, Barenia, Everest, etc.), but the 20mm specification limits the options available online. It is advisable to choose custom-made artisan straps to ensure construction quality and precise compatibility, especially for a dress watch of this calibre.
How long does a leather strap last on this watch?
Durability depends on the material and usage. A quality alligator strap with proper tanning lasts an average of 3-5 years of daily wear, while vegetable-tanned calf leather can extend to 6-7 years while developing attractive patina. Exposure to sunlight, sweat and extreme temperatures reduces durability. An artisan strap with an 18-month warranty provides construction protection; after this period, deterioration is related to the nature of the leather and usage habits.
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

