Strap for Excellence Le Régulateur Malachite

The lug width of the Louis Erard Excellence 85237AA39.BVA37 is 22 millimetres. This measurement is taken from the centre of one lug to the centre of the opposite lug, and it determines compatibility with all aftermarket straps designed for this model. A 20mm or 24mm strap will not fit correctly into the lugs.

For the Excellence 85237AA39.BVA37, we recommend Tuscan vegetable-tanned leather in cognac brown or midnight blue: the steel case will develop an authentic patina through time with the leather's natural grain texture. NATO straps in heavy cotton provide versatility and sport capability whilst maintaining classical elegance. For resilience and minimal maintenance, vulcanised rubber or regenerated calf offer aesthetic integrity with reduced upkeep requirements.

Strap removal involves detaching the spring bars that connect the strap to the lugs. Using a dedicated spring bar remover tool or a small flathead screwdriver, apply gentle downward pressure on the bar to release the internal spring, extracting it from the lug. Once both lugs are free, the strap separates from the case. To install a new strap, align the holes and reintroduce the bars until they click into place. This requires precision rather than force, and no advanced tools are necessary.

Absolutely. Aftermarket 22mm straps are fully compatible with the Louis Erard Excellence 85237AA39.BVA37. We recommend choosing strap quality equivalent to the case itself – Tuscan leather, alligator, shell cordovan, or vulcanised rubber – to preserve the aesthetic and functional harmony of the watch. Milano Straps provides a curated selection of 22mm straps crafted with artisanal techniques that reflect Louis Erard's engineering philosophy.

Leather strap longevity depends on tanning method and usage patterns. A vegetable-tanned Tuscan leather strap, with proper care (drying after perspiration, avoiding prolonged extreme humidity), will last 3–5 years with daily wear. Shell cordovan, owing to its exceptional fibre density, can exceed 10 years of service life. Vulcanised rubber offers comparable durability to cordovan in humid environments. The patina developing over time represents added value, not deterioration.