Omega · De Ville
Strap for De Ville Prestige Hand Wound 36.1 Chronograph Stainless Steel / Silver / Bracelet
Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
The De Ville 4540.31.00, seen from the bench
Frequently asked questions
What is the lug width of the Omega De Ville 4540.31.00?
The lug width of the Omega De Ville 4540.31.00 is 18 mm. This measurement must be respected rigorously: an undersized strap creates lateral play, while an oversized one will not fit into the lug seatings without forcing. Always measure perpendicularly between the internal attachment points to verify compatibility.
What is the best strap for the Omega De Ville 4540.31.00?
Alligator remains the reference choice for the De Ville: its natural irregular grain amplifies the perception of solidity without adding thickness. A thickness of 1.4–1.6 mm paired with a brushed steel deployant clasp maintains formal aesthetic balance. Alternatively, vegetable-tanned calf offers immediate patina and develops deep tones over time.
How do I change the strap on my De Ville 4540.31.00?
The De Ville uses standard 18 mm spring bars. Remove the spring bar by gently pressing one of the two lateral pins toward the center until the release clicks, then extract the old strap. Insert the new one by aligning the holes on the sides perfectly, then reinsert the spring bar until it locks definitively. Verify that both sides are locked symmetrically.
Can I use a 20 mm aftermarket strap on the De Ville 4540.31.00?
No. A 20 mm strap will not fit into the lug seatings without forcing and risks deforming the steel case. The lug geometry is engineered for 18 mm: this dimension is non-negotiable. Respecting this measurement guarantees perfect compatibility and preserves the integrity of the case.
How long does a leather strap last on the De Ville 4540.31.00?
A quality alligator or calf strap has an average lifespan of 4–6 years with daily wear, extendable to 8–10 years with regular maintenance and rotation with other straps. Vegetable tanning develops patina more rapidly but ages better. Shell cordovan resists up to 10–12 years while maintaining structural integrity, although the specular patina will tend to dull in the final years of life.
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

