Strap for Divers Sixty-Five 42 Stainless Steel / Green / Rubber

The lug width of the Oris Divers 65 01 733 7720 4057-07 4 21 18 is 21 millimetres. This parameter is embedded in the reference designation itself and represents the historical standard for professional dive watches. To verify compatibility of an aftermarket strap, measure the distance between the lug holes using a ruler, ensuring the measurement is precisely 21 mm.

The choice depends on intended usage and aesthetic preference. An alligator strap with vegetable tanning confers sartorial elegance whilst maintaining formal compatibility. A NATO strap in vat-dyed Cordura fabric respects the watch's diving heritage and offers practicality. A vulcanised rubber strap guarantees reliability in saltwater and humid environments. For those seeking plurennial longevity, shell cordovan with a stainless steel deployante represents the optimal balance between durability and aesthetic dignity.

Use a spring bar tool to remove the spring bars from the lug. Insert the tool into the small lateral slot of the spring, press gently to release the pin, then extract the old strap. Position the new strap so it aligns precisely with the lug holes, then reinsert the spring bars until a definitive click is heard. Verify the strap is secure by gently pulling. If you lack tools, our artisanal straps are fitted gratis at the Casati Milano atelier by appointment.

A strap is compatible if its lug width is precisely 21 millimetres. Compatibility depends exclusively on this parameter, not on the watch's overall dimensions or market value. Our artisanal straps for 21mm lug width are tested and compatible with the Divers 65. We recommend always verifying lug width before purchase by measuring the distance between holes with a ruler.

Leather strap longevity depends on material type, tanning method and intensity of use. Vegetable-tanned alligator subjected to moderate wear (worn 3-4 days weekly) maintains elasticity and colour for 4-6 years. Shell cordovan, denser in composition, resists degradation for 6-8 years. Vulcanised rubber surpasses 10 years without significant deterioration. Prolonged exposure to chlorine, unrinsed saltwater and direct sunlight reduces longevity. Seasonal maintenance—gentle cleaning, conditioning with specialist products—extends strap life by 2-3 years.