Strap for Aquaracer 300M Big Date 41 Stainless Steel / Yellow / Rubber

The lug width of the WAF1012.FT8010 is exactly 20 millimetres, measured on the inner lug of the case where the strap attaches. This dimension is non-negotiable for compatibility: an 18mm or 22mm strap will not fit correctly and creates structural misalignment.

We recommend alligator leather in vegetable tanning (cognac colour) or thick black polished calf leather for formal wear. For sports contexts, a NATO strap in cotton or polyamide is ideal. If you intend to use the watch in marine environments, FKM (Viton) rubber is the superior technical choice for resistance to chlorine and salt water.

The WAF1012.FT8010 has fixed lugs: you must remove the spring bar securing the strap at both ends of the lug using a spring bar tool. Extract the spring bar, replace the old strap with the new one, and reinsert the spring bar into the lateral groove. Verify alignment before closing.

Yes, any strap with a 20mm lug width is dimensionally compatible. However, verify that the strap thickness (typically 2.5–3mm) is consistent with the physical space between the case lugs; excessively thick straps may create tension on the spring bar mechanism.

Durability depends on material and usage. Alligator or vegetable-tanned calf leather lasts 2–4 years under normal conditions (daily wear without immersion); if frequently exposed to saltwater, degradation accelerates to 1–2 years. An FKM rubber strap offers superior longevity (5–7 years) but requires periodic rinsing to remove salt deposits. Standard warranty is 18 months.