Strap for Divers Sixty-Five 40 Stainless Steel / Green / Bracelet

The lug width of the Oris Divers 65 01 733 7707 4057-07 8 20 18 is 20mm. Oris manufacturing tolerance is ±0.2mm. To verify with precision, measure the internal distance from one lug to the other, excluding the lug thickness itself. We recommend visiting Atelier Casati Milano for a tactile verification before purchasing an aftermarket strap.

There is no absolute choice—it depends on intended use. For elegance, a vegetable-tanned alligator in deep chocolate tone develops patina over time. For daily wear and robustness, French vegan leather offers gradual softening. If you use the Divers in salt water, a cotton-nylon NATO ensures salinity resistance. For intensive wet use, a vulcanised rubber strap maintains grip and durability indefinitely.

Strap replacement requires extraction of the spring bars—small metal springs that secure the strap to the lugs. Obtain a spring bar tool (available from Casati Milano) and apply gentle pressure to the rear of each spring bar until they exit their seats. Remove the worn strap and insert the new one, ensuring spring bars engage completely in the lugs. Verify stable positioning before wearing.

Yes, provided the lug width is exactly 20mm. Any strap marked '20mm' will fit the lugs of your Oris. Atelier Casati Milano recommends choosing thicknesses between 3.5mm and 4.5mm to maintain visual proportion with the 40mm case. An undersized strap appears visually fragile; an oversized one burdens the wrist.

A vegetable-tanned alligator with ordinary maintenance (avoid prolonged submersion, dry gently after fresh water contact) retains structural integrity for 8–12 years. Vegan vegetable-tanned leather softens after 2–3 months of daily wear but maintains functionality for 5–8 years. Shell cordovan ages more slowly and can last 12–15 years. Vulcanised rubber, being synthetic, exceeds 15+ years without significant degradation. Casati Milano offers reconditioning and replacement services.