Strap for Divers Sixty-Five 42 Stainless Steel / Black / NATO

The lug width (misura ansa) of the Oris Divers 65 01 733 7720 4054-07 5 21 26FC is precisely 21mm. This measurement is taken internally, between the inner shoulders of the spring bars (pins), and is essential for selecting compatible straps. A tolerance of ±0.5mm is generally acceptable for fitting.

For the Oris Divers 65 01 733 7720 4054-07 5 21 26FC, we recommend three categories: (1) Alligator or calf leather with vegetable tanning for elegance without technical compromise; (2) NATO straps in heavy canvas for practicality and versatility; (3) Elastomer or vulcanised rubber for dedicated diving use. Your choice depends on wearing context and desired patina development.

To change the strap: (1) obtain a spring bar tool or small screwdriver; (2) flip the watch over and locate the lateral pins passing through the lugs; (3) gently press the pin from one side to release the internal spring; (4) extract the pin completely; (5) repeat on the other side; (6) insert the pins into the new strap, ensuring the spring clicks into position. If inexperienced, entrust the task to a specialist watchmaker.

Yes, the Oris Divers 65 01 733 7720 4054-07 5 21 26FC accepts 21mm aftermarket straps. Milanostraps.it offers a selection of artisanal straps in this size, in leather, NATO, and rubber. All models are designed for standard fitting with universal dragonfly or spring bar pins. Verify that the strap is genuinely 21mm before purchase.

The lifespan of a leather strap depends on tanning method and daily use. With vegetable tanning (more durable), a quality artisanal strap lasts 3–5 years under normal wearing conditions. Leather develops natural patina over time. Constant water exposure or perspiration reduces longevity; a strap intended for frequent diving benefits from elastomeric or rubber materials. Regular maintenance (cleaning and drying) significantly extends useful life.