Strap for Aquis Date 43.5 Stainless Steel / Green / Bracelet

The lug width of the Oris Aquis 01 733 7789 4157-07 8 23 04PEB is 23mm. This measurement is defined as the internal distance between the two metal lugs of the case. It is essential to measure correctly with a digital calliper before purchasing a compatible strap, as even a 1mm difference compromises the fit and stability of the strap on the wrist. Unlike Aquis models with 22mm or 24mm lug widths, the 23mm requires more selective sourcing from strap manufacturers.

The choice of strap depends on the intended use and desired aesthetic. For formal elegance and everyday versatility, superior quality alligator with vegetable tanning offers the highest standard in natural patina and colour evolution over time. For pure tool use—sea, mountain, outdoor—a robust NATO or FKM rubber strap guarantees practicality and durability. Calf leather with vegetable tanning represents the ideal compromise: artisanal elegance combined with robustness and development of unique patina. The Aquis, being a tool watch, naturally accepts any of these choices.

Strap replacement is performed using spring bars that connect the strap to the case lugs. Using a dedicated spring bar tool—or an improvised thin blade—compress the pin slightly on one side, extract it from the upper lug, and repeat for the other end. Once the original strap is free, insert the new strap by aligning the side holes with the pins, and push until the pin seats fully in the lower lug. It is essential to perform the operation with care to avoid scratching the case: we recommend protecting the lugs with adhesive tape, or consulting a professional.

All straps with a 23mm lug width are compatible, provided the spring bar is of the same diameter as the original (typically 1.8mm for Oris). The market offers leather (alligator, calf, shell cordovan), NATO fabrics, technical FKM rubber straps, and metal bracelets. Milano Straps provides a curated selection of 23mm artisanal leather straps in Italian and European leather, crafted bespoke. It is advisable to avoid generic straps from global marketplaces, which often do not meet the construction quality required by a timepiece of this calibre.

The lifespan of a leather strap depends on the quality of the raw material, the tanning method, and daily wear. A premium vegetable-tanned calf leather, worn daily and exposed to moderate humidity, typically lasts 4-6 years before requiring replacement. A more robust alligator can extend this lifespan to 8-10 years. Frequent exposure to water, pool chlorine or sea salt accelerates leather ageing. To extend the strap's life, dry it immediately after water exposure, periodically apply a protective oil specific to vegetable-tanned leathers, and alternate strap use to allow the leather to 'breathe' and dry naturally between uses.