Strap for Divers Sixty-Five 40 Stainless Steel / Bronze / Black / Calf

The lug width (ansa width) of the Oris Divers 65 01 733 7707 4354-07 5 is 20 mm. This measurement refers to the internal distance between the two metal pins that attach the strap to the case. It is essential to verify this dimension before purchasing an aftermarket strap, as straps of different sizes (19 mm or 21 mm) will not fit correctly and may compromise both the safety and structural integrity of the watch.

Three profiles are recommended for the Divers 65 01 733 7707 4354-07 5: (1) Alligator with vegetable tanning, for those desiring a natural patina that ages synergistically with the bronze case; (2) NATO in polyamide, for historical authenticity (1960s-70s style) and rapid strap change convenience; (3) Vulcanised FKM rubber, if the watch is destined for frequent diving or marine environments. The choice depends on predominant use: formal-recreational for alligator, versatile-vintage for NATO, technical-immersive for rubber.

Strap replacement requires a spring bar remover tool (small lever device) or a flat-bladed knife. Position the watch face-up. Locate the lateral metal pin supporting the strap inside the lug. Gently insert the spring bar remover's tip beneath the small pin tongue and push laterally until the pin slides out of its housing. Repeat on the opposite side. To install the new strap, align its holes with the case lug openings and reinsert the pins until they click firmly into place. If unfamiliar with the procedure, consult a trusted watchmaker.

Yes, all straps with a 20 mm lug width are mechanically compatible. MilanoStraps offers a curated selection of 20 mm straps in vegetable-tanned leather, NATO, and technical rubber, all tested and ready to ship. Compatibility is assured by the standard 20 mm width; however, it is advisable to verify strap thickness, which must slide smoothly into the lug openings without forcing.

The durability of a leather strap depends on tanning method and usage. A high-quality alligator strap with vegetable tanning, subject to regular wear and proper maintenance (periodic cleaning, occasional application of specialist creams), guarantees 4-6 years of service before showing structural fatigue. If the strap is frequently exposed to saltwater without proper drying, lifespan reduces to 2-3 years. A polyamide NATO strap, conversely, is virtually indestructible: the synthetic fibre does not degrade in contact with water and resists for decades if not exposed to prolonged intense UV radiation.