Omega
De Ville 4540.31.00— lug 18mm

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.

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.

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.

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.

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.