Strap for Excellence Regulator Stainless Steel / Silver

The lug width of the Louis Erard Excellence 85237AA21.BVA31 is 22mm. This dimension represents the internal distance between the two lugs of the case and is essential for selecting compatible straps. To verify this measurement on your timepiece, use a digital calliper positioned perpendicularly between the lug shoulders.

For the Louis Erard Excellence 85237AA21.BVA31, we recommend a strap crafted from vegetable-tanned Tuscan leather, preferably with aged patina (tobacco tone). This choice amplifies the minimalist aesthetic of the regulator dial and imparts authentic character over time. Alternatively, a deep mahogany alligator strap enhances formality, or a dense canvas NATO offers everyday versatility.

To change the strap, remove the deployant clasp from the buckle (typically via two lateral screws). Next, extract the spring bars using an appropriate tool and insert the new strap into the lugs. Ensure the strap passages adhere perfectly to the 22mm lugs without lateral play. Reattach the buckle and deployant. We recommend performing this operation on a clean, scratch-resistant surface.

Yes, absolutely. The standard 22mm lug width permits the use of artisanal aftermarket straps provided the passage section is proportioned correctly. Always verify that the strap is manufactured specifically for 22mm lugs and that the passages adhere securely to the lug geometry without play. Prefer straps crafted from vegetable-tanned leather or vulcanised rubber to ensure durability and compatibility with the case profile.

The durability of a leather strap depends on intensity of use and material quality. A vegetable-tanned leather strap of artisanal quality, worn daily on a 42mm timepiece such as the 85237AA21.BVA31, maintains functional integrity for 3–5 years. The natural patina that develops over time represents an aesthetic asset, not a defect. In humid or very warm climates, longevity may decrease. A vulcanised rubber strap offers superior longevity (5–7 years) owing to the chemical inertness of rubber compared to the organic hydration of leather.