Strap for Aquis Date Calibre 400 41.5 Staineless Steel - Yellow Gold / Green / Rubber

The lug width is exactly 22mm, a robust standard typical of diver tool watches. It is measured with a digital calliper between the two internal lugs of the case, in accordance with ISO 1112 standard. This dimension ensures compatibility with the vast majority of aftermarket straps on the market.

It depends on usage and aesthetic preferences. For elegance: Tuscan leather in vegetable tanning, ocean blue or cognac brown. For sports versatility: robust cotton-nylon NATO strap. For intensive aquatic use: FKM (Viton) rubber with fine grain texture. The key is to respect the 22mm lug width and use stainless steel 316L or titanium hardware.

The procedure requires a spring bar removal tool: locate the small metal protrusions (the spring bars) inside the lugs, then gently press with the tip of the tool to release the spring bar. The strap will come away easily. To fit the new strap, align the strap holes with the spring bars and press until you hear a click. Never force: a crisp click indicates correct positioning.

Yes, any strap with a 22mm lug width is compatible. Ensure that the thickness of the strap terminals is less than 4mm to avoid friction with the case. Verify that the deployante (if present) is stainless steel 316L or titanium to prevent galvanic corrosion with the yellow gold case elements.

A high-quality leather with vegetable tanning has a lifespan of 3–5 years with daily wear, extendable to 7–10 years with occasional use and proper maintenance. Frequent exposure to fresh or salt water reduces durability: always rinse after bathing and allow to air-dry, away from direct heat sources. A NATO or rubber strap offers greater durability in humid environments.