Strap for Aquis Depth Gauge Chronograph

The lug width of the Oris Aquis 01 774 7708 4154-Set RS is 26 millimetres, an exceptional and rare specification in contemporary horology. To verify it correctly, position the watch with the dial facing downward and measure the internal distance between the two lateral attachment pins connecting the case to the strap. This extraordinary width reflects the volumetric proportion of the 48mm case and requires specifically dimensioned straps.

Material selection depends on the usage context. For formal environments, an alligator strap with vegetable tanning enhances the technical nature without sacrificing elegance. For daily versatility, calf leather with fine grain allows fluid transitions between different settings. If usage includes aquatic activities, fluoroelastomeric rubber offers superior grip and salt-water resistance. NATO nylon in technical construction represents the ultimate solution for versatility and rapid interchangeability without significant investment.

To change the strap, you require a spring bar removal tool available from specialised retailers. Position the watch in a soft holder with the dial facing downward. Insert the flat tip of the spring bar tool into the access hole beneath the lug to compress the retention pin, then extract the used strap. Repeat the operation from the opposite side. Install the new strap by aligning the pins with the attachment holes, compressing the upper pin until you hear a click of closure. Verify security before wearing.

Yes, artisanal straps compatible with 26mm lug width are available through high-level specialists such as Milano Straps. The rarity of this specification makes compatibility a critical element: it is essential to verify that the strap is explicitly dimensioned for 26mm, not for standard sizes. At the Casati Milano atelier, bespoke straps can be commissioned with millimetre tolerances in premium materials such as alligator, calf, cordovan and technical rubber.

The durability of a leather strap depends on usage intensity, environmental conditions and tanning quality. An alligator or shell cordovan strap with vegetable tanning, if subjected to regular maintenance and protected from excessive humidity, maintains structural integrity for 3-5 years of daily use. Calf leather, being more porous, has a slightly shorter lifespan (2-4 years). Exposure to salt spray, constant humidity or extreme heat accelerates ageing. The natural patina that develops represents a positive aesthetic characteristic, not necessarily a sign of functional deterioration.