Strap for Excellence Le Régulateur Louis Erard x Alain Silberstein Stainless Steel / White

The lug width of the Louis Erard Excellence 54230AS61.BVA08 is 21 millimetres. This measurement represents the internal distance between the two lugs of the case and is essential for selecting a compatible strap. You can verify this measurement yourself using a digital caliper.

We primarily recommend a strap in alligator with vegetable tanning: the natural texture of the leather and the patina it develops over time enhance the sober, constructive character of the timepiece. Alternatively, light waxed calf offers refinement with minimal bulk. For daily wear, a cotton-nylon NATO ensures practicality without compromising the aesthetic dignity of the satin-finished case.

Changing the strap on the 54230AS61.BVA08 requires a minimal tool: a spring bar tool (or even a blunt-edged penknife). Position the tool under the lug of the case, gently push the elastic pin downwards, then slide the old strap laterally away. Repeat on the other lug. To mount the new strap, insert the spring bars into the lug seats until you feel the click of closure.

Yes, provided you respect the 21 millimetre lug width specification. Many OEM (original equipment manufacturer) straps for 40 mm watches use 20 mm; therefore, compatibility must be verified before purchase. Atelier Casati Milano and our partner manufacturers guarantee straps in natural leather of superior quality to the synthetic alternatives typically included in original boxes.

A natural leather strap with vegetable tanning, if subjected to minimal maintenance (avoiding prolonged salt water exposure, checking the integrity of the spring bar every 6–12 months), guarantees a lifespan of between 5 and 10 years. The leather softens with use, developing a golden patina. At the end of its life, the strap can be replaced without technical intervention on the case; the watch remains unaltered.