Strap for De Ville Master Chronometer Stainless Steel - Sedna Gold / Grey / Bracelet

The Omega De Ville Prestige 40 ref. 434.20.40.20.06.001 has a lug width of 19mm. This specific measurement requires a strap with precise dimensions: a strap even half a millimetre wider or narrower would create visible play between the lug and the keeper. Before purchasing a strap, verify the exact distance between the two insertion holes by manually measuring with a calliper.

The best strap depends on how you use your watch. For formal contexts, we recommend dark brown alligator (cognac) with stitching in pale yellow thread: the characteristic grain of the leather dialogues beautifully with the Sedna Gold case and develops a natural patina over time. For everyday versatility, glossy black calf leather with stainless steel deployant clasp guarantees elegance without compromise. Those seeking contemporaneity can opt for a structured black rubber strap, which transforms the dress watch into a more casual object.

The strap is changed using a spring bar remover—a small, flat tool usually supplied by Omega or purchasable from watch specialists. Position yourself under the lug insertion holes, gently insert the tool to lift the circular spring (spring bar) that holds the strap. Once lifted, the old strap slides out easily. Repeat the operation on the opposite lug. To insert the new strap, align the holes to the springs and push downward until it clicks: you will feel a click when the spring bar repositions correctly. Avoid excessive force to prevent damage to the internal springs.

Any strap with a 19mm lug width is compatible. Online you will find selections dedicated to Omega models, with options in alligator, calf, shell cordovan, Italian leather and rubber. Ensure the strap has no imperfections in the insertion holes, as even a small burr could prevent perfect alignment. At Casati Milano you can commission custom-made straps with full personalisation: choice of leather, embroidered initials, stitching thread colour and clasp type (buckle or deployant).

Durability depends on the quality of the leather and the intensity of use. A high-quality alligator or shell cordovan strap typically lasts 3-5 years with regular use, developing a fascinating patina over time. Calf leather tends to wear more quickly—18-30 months—but this is part of its aesthetic evolution: cracks and colour variations tell the story of use. To extend durability, avoid prolonged exposure to moisture and dry the strap after contact with water. Straps made with vegetable tanning age better than those treated with artificial tannins. Casati Milano offers an 18-month guarantee on all personalised straps.