Strap for Aquis Date Diamonds 36 Stainless Steel / Black - Diamond / Rubber

The lug width is 18mm. This measurement represents the distance between the inner shoulders of the case lugs, where the strap attaches. It is a geometric specification derived from the 36mm case diameter, following the classical 1:2 proportional ratio of Swiss watchmaking.

We recommend natural alligator or vegetable-tanned calf for formal contexts, FKM rubber for intensive aquatic environments, nylon NATO for tactical versatility. Your choice depends on desired patina: brown mahogany on alligator ages beautifully toward burgundy, while calf maintains consistent texture for 5-7 years.

Position the watch on a soft cloth. Using a small screwdriver or spring bar tool, press inward on the small spring mechanism (spring bar) located beneath the lug. Simultaneously extract the spring bar itself, freeing the old strap. Insert the new strap by first attaching one end, then compressing the spring mechanism on the opposite end until it locks securely. Execute with moderate pressure to avoid damage.

Yes, provided the lug width is exactly 18mm. High-quality artisanal aftermarket straps (leather, rubber, NATO) are fully compatible. Verify that strap thickness does not exceed 3mm to ensure proper passage under the lugs. A quality aftermarket strap often surpasses the original Oris strap in durability and tactile texture.

A quality calf or alligator strap lasts 4-8 years with daily wear, depending on sun exposure, humidity, and maintenance. Leather requires humidification during extended storage (every 6 months, at least 24 hours in 50-60% relative humidity). Vulcanised rubber resists 6-10 years; nylon NATO 3-5 years before visible weave deterioration.