Strap for Oris Divers 65 01 733 7720 4055

The lug width is 21 millimetres. This is the distance between the two internal shoulders of the spring bar that attaches the strap to the case. You can verify this using a digital calliper: position the tool between the two shoulders, excluding the spring bar itself. Any strap certified for 21mm will fit perfectly without lateral play.

It depends on your intended use. For daily elegance, we recommend alligator in chocolate brown or calf leather with vegetable tanning: both develop beautiful patina over time. For sportive versatility, a NATO strap in charcoal grey remains the most adaptable choice. If you plan to use the watch for frequent diving, vulcanised FKM rubber is the most appropriate option: it guarantees total water resistance and resists degradation in saltwater.

Use a spring bar tool, inserting the flat spatula into the side recess of the spring bar. Press gently inward to release it from its seat. Repeat on the other side. Once the spring bar is free, remove the old strap. Insert the new strap, aligning the holes with the lug shoulders, then reinsert the spring bar until it clicks into place. Verify that the spring bar is fully seated in both holes.

Yes, absolutely. The 21mm lug width is an industry standard for this class of watches. Any strap manufactured for 21mm lug width will fit without issue, provided the spring bars are standard diameter (typically 1.6mm). Milano Straps 21mm straps are all tested to ensure perfect compatibility with the Divers 65 and similar models.

Longevity depends on use and maintenance. A high-quality alligator or calf strap, with robust stitching, typically lasts 3-5 years with daily wear and occasional water contact. Frequent exposure to saltwater (regular diving) reduces lifespan to 2-3 years. Vegetable-tanned leather ages elegantly, developing patina, but requires rapid drying after wetting. A vulcanised FKM rubber strap, by contrast, does not degrade: it remains functional indefinitely.