Louis Erard
Excellence 54230AA41.BDC02— lug 21mm

The lug width of this model is 21mm, measured between the inner edges of the two spring bar attachment lugs on the case. This dimension is model-specific and essential for sourcing compatible straps without lateral play or case friction.

For this brushed stainless steel 40mm case, we recommend primarily an alligator or vegetable-tanned calf leather strap in dark brown, cognac, or black tones. The interplay between leather grain and the satinised case finish produces a refined aesthetic result. Alternatively, a structured NATO strap offers functional versatility whilst maintaining visual coherence.

Use a spring bar removal tool: position the bifurcated tip beneath the lug, apply gentle lateral pressure to compress the internal spring mechanism, then extract the lug from the case hole. Repeat for the opposite end. Ensure the lugs are perfectly aligned before inserting the new strap, verifying the absence of lateral play.

Yes, provided the aftermarket strap is constructed specifically for 21mm lug width. Artisanal-quality straps (such as those from milanostraps.it) guarantee precise manufacturing tolerances, ensuring optimal fit and long-term durability without damaging the original case lugs.

A quality aniline leather strap, vegetable-tanned (alligator or calf), maintains structural integrity for 3-5 years of regular wear, with variability depending on moisture exposure, perspiration, and replacement frequency. Well-maintained leather develops aesthetic patina over time, increasing collectability. Rubber straps typically last 2-3 years before visible elasticity failure occurs.