Strap for Aquis Date Calibre 400 43.5 Stainless Steel / Green / Rubber

The lug width is 23 millimetres. This measurement is specific to this model and requires straps constructed to this non-conventional dimension. Measurement method: use a digital calliper positioned at the inner shoulders of the spring bar lug, side to side, without applying pressure.

The choice depends on intended use. For formal elegance, an alligator strap with vegetable tanning and natural patina amplifies material contrast with the ceramic case. For active diving, a technical elastomer (EPDM) with slip-resistant texture ensures stability on wet wrist. A NATO in ballistic nylon offers tactical versatility without compromise.

Use a spring bar tool to gently remove the lug springs from their seats. Position the tool perpendicular to the spring, apply controlled pressure until tension releases, then extract the springs. Insert the new strap by aligning its lugs to the seat, ensuring the springs lock completely on both sides.

Yes, provided it is constructed with a 23-millimetre lug attachment. Milano Straps specialises in bespoke straps for this non-standard measurement. Verify that your chosen strap is specifically designed for 23mm, not approximations such as 20mm or 24mm, to avoid excessive play or spring bar binding.

A premium leather strap (alligator, calf) subject to regular immersion lasts 18–36 months with proper maintenance. Repeated saltwater exposure accelerates ageing. Recommended practice: alternate with a technical elastomer during aquatic seasons, dry and condition the leather monthly with treatments specifically formulated for wetted hides.