Strap for Aquis Date Diamonds 36.5 Stainless Steel - Diamond / Blue - Diamond / Textile

The lug width of the Oris Aquis 01 733 7731 4995-07 5 18 46FC is 18 millimetres. This is a non-standard dimension for its category, reflecting the proportional design of the 41.5 mm case. To verify, remove the original strap and measure the internal distance between the two attachment pins using a digital calliper. All compatible straps must have exactly 18 mm lug width.

The choice depends on your intended use. For diving or water sports, we recommend a vegetable-tanned alligator strap: it drains saltwater naturally and resists moisture without swelling. For daily urban wear, Tuscan calf in 1.4 mm thickness offers elegance and durability. For extreme or tactical conditions, a technical nylon NATO strap is the most reliable solution. For those desiring robustness without aesthetic compromise, vulcanised rubber (Fluoroelastomer) maintains its shape for years and creates visual coherence with the brushed steel case.

The process is straightforward and requires no specialist tools. Turn the watch face towards you and locate the spring bar connecting the strap to the case (usually a horizontal metal rod). Use a spring bar removal tool (often supplied with quality watches, or available from watchmakers) to gently push the bar from one side, extracting the strap. Repeat on the opposite side. Insert the new strap by aligning the lug holes with the case pins, then reinsert the spring bar by pushing until you hear a click. Ensure the strap is fully secured before wearing the watch.

Yes, provided it is correctly manufactured for 18 mm lug width. Verify that the strap is explicitly labelled as compatible with 18 mm lug width: even a 0.5 mm variation can cause instability or dropping risk. Artisanal quality straps, such as those offered by milanostraps.it, are constructed to precise specifications for each lug width, with controlled manufacturing tolerances. Avoid generic or low-quality straps where tolerances may vary by 1-2 mm.

Strap lifespan depends on tanning method and use intensity. A vegetable-tanned alligator strap can last 3-5 years under intensive conditions (frequent diving, saltwater exposure) thanks to the material's natural resistance. A Tuscan calf strap typically lasts 2-3 years in daily urban wear, extending to 4-5 years with moderate sun and humidity exposure. Failure typically occurs at the maximum flex point near the case or at the buckle, where mechanical stress concentrates. Periodic maintenance (cleaning, conditioning with neutral waxes) significantly extends lifespan. Vulcanised rubber straps have theoretically unlimited lifespan but may become brittle after 7-10 years of intensive UV exposure.