Strap for Aquis Date Calibre 400 41.5 Stainless Steel / Green / Bracelet

The Oris Aquis 01 400 7769 4157-07 8 22 09PEB features a lug width of 22mm, a standard dimension for this watch family. This measurement is calculated as the internal distance between the two case flanges and tolerates no deviation: a undersized strap (20mm) will sit loose, whilst an oversized strap (24mm) will not fit properly. To verify with precision, measure your watch by positioning a ruler on a flat surface and passing it between the internal spring bar shoulders.

For a diver-oriented timepiece such as the Aquis, strap selection depends on intended use. If you seek aesthetic durability and daily comfort, an alligator strap with vegetable tanning or a technical NATO woven strap are the most coherent solutions. Shell cordovan in vegetable tanning develops natural patina over time, becoming increasingly compelling. For those who frequently exit the water whilst wearing the watch, a technical NATO strap in dense fabric is the rational choice, as it dries within minutes without degradation. FKM rubber represents the ultimate solution for absolute waterproofness and maintenance simplicity.

To change the strap on a watch with 22mm lug width, you must remove the spring bars—the elastic pins that anchor the strap to the case. Use a spring bar tool: insert the fine tip into the gap between case and strap, pressing gently to compress the internal spring. Once compressed, the pin slides out. Exercise caution not to scratch the ceramic case during this operation. Repeat at the opposite side to free the old strap. Installing the new strap is the reverse operation: align the strap hole with the pin and press gently until you perceive the spring catch.

Yes, any quality strap manufactured with 22mm lug width is compatible with the Oris Aquis 01 400 7769 4157-07 8 22 09PEB. However, it is advisable to select materials and colours that dialogue coherently with the character of the instrument. A premium NATO or structured alligator strap enhances the case geometry, whilst an FKM rubber strap offers maximum technical practicality. Always verify that the strap is manufactured with precise tolerances (±0.1mm on lug width), as poorly constructed straps may sit loose or forced.

The lifespan of a leather strap on a submersible timepiece like the Aquis depends on tanning method, material, and intensity of use. A structured alligator strap worn with moderation lasts 3–5 years before peripheral fibres show signs of failure. Shell cordovan in vegetable tanning, if conditioned every 6–12 months with natural wax, can last 5–7 years. Italian regenerated calf leather offers intermediate durability (3–4 years). If the watch is frequently exposed to saltwater, a woven NATO textile or FKM rubber remain the longest-lasting choices, as they suffer no decay. To extend the useful life of a leather strap, thoroughly dry your wrist after saltwater contact and apply vegetable protective wax at least biannually.