Strap for Aquis Date Calibre 400 43.5 Stainless Steel / Blue / Bracelet

The lug width of this model is 23mm, an unconventional dimension in the sports watch segment. Measure the distance between the lug attachment pins on the case to confirm compatibility. This specification is stamped on the international Oris warranty card.

This depends on your intended use. For everyday elegance: alligator with vegetable tanning or shell cordovan, which will develop patina visually over time. For diving practicality: vulcanised rubber or NATO straps, easily interchangeable. Box calf represents a compromise between aesthetics and reduced maintenance.

The strap is secured to the lugs via pins or spring-bars (springs that click into the lug holes). Remove the pin with a dedicated tool or carefully detach the existing strap. Align the new strap (ensuring it is genuinely 23mm) and press the pin until you hear an audible click. Always verify the strap is firmly secured before wearing the watch.

Yes, provided the strap is genuinely engineered for 23mm lugs. Artisanal high-quality straps often offer finishes and materials superior to the original, with customisation options for colour and texture. Always verify compatibility with your supplier before purchase.

A high-quality leather strap with vegetable tanning typically lasts 3–5 years with moderate daily wear. Frequent exposure to water, chlorine, and salt water reduces durability to 1–2 years. If your watch is used for regular diving, choose a rubber strap for radical longevity. Regular maintenance (application of protective balm) extends the life of leather.