Louis Erard
Excellence 54230SG04.BAAV04— lug 21mm

The lug width of the Louis Erard Excellence 54230SG04.BAAV04 is precisely 21mm. This measurement represents the distance between the two attachment points on the case where the spring bars of the strap insert. To verify compatibility of an aftermarket strap, position a digital calliper perpendicular to the case-crown axis, between the lug ears, and measure the external distance. An incompatible strap can damage the lugs or create unwanted play during wear.

For the Excellence 54230SG04.BAAV04, we recommend a black alligator strap with medium grain and embroidered edge finishing, or aged vegetable-tanned calfskin in dark cognac. These materials reflect the sober constructive philosophy of the watch and acquire a natural patina over time. For sport-casual use, a natural rubber strap with undersized ribs maintains the formal elegance of the model. Avoid low-quality Asian rubber or synthetic leather, which do not age with dignity.

To change the strap, proceed as follows: position the watch on a soft surface with the dial facing downward. Locate the lug ears—these are the two metal rings on each side of the case. Using a spring bar tool or a pointed toothpick, insert the tip into the small hole beneath the lug ear and gently push towards the centre to disengage the spring bar. Repeat for the other ear, then remove the old strap. To fit the new one, insert the bars into the ears whilst keeping the spring compressed with the tool, then release. Verify that the bars are fully seated in the ears.

Yes, you can use any aftermarket strap with a 21mm lug width. Compatibility depends exclusively on width and attachment conformity. Milanostraps artisanal straps are manufactured to constructive specifications that guarantee perfect fit to the Excellence 54230SG04.BAAV04 lugs, without play or forcing. Always verify dimensions before purchase: 21mm external width at the spring bar seats is the definitive parameter.

A high-quality natural leather strap—alligator, vegetable-tanned calfskin, shell cordovan—lasts typically 3–7 years with daily wear and proper maintenance. Longevity depends on: frequency of use, humidity exposure, perspiration, environmental factors, and care (periodic cleaning, conditioning with specific creams). Vegetable-tanned leather ages better than industrial leather, acquiring patina and character over time. A natural rubber strap lasts 5–10 years before losing elasticity. To maximise lifespan, rotate straps during the week, avoiding continuous use of the same strap.