Strap for Excellence Le Régulateur Louis Erard x Vianney Halter Stainless Steel / Silver

The lug width of the Louis Erard Excellence 85237AA51.BVA35 is 22mm. To verify, measure the distance between the lateral anchor pins (the metal studs that sit in the case lug holes). This measurement ensures compatibility with all our strap options catalogued for this dimension.

A brown calf leather with vegetable tanning represents the most harmonious choice: the fine grain texture dialogues with the case brushing, whilst the warm tone echoes the guilloché's earthy undertones. For greater formality, black alligator with a deployante buckle imparts solemnity. For versatility, FKM rubber eliminates the need to manage natural leather patina.

Use a spring bar tool to extract the anchor pins from the case sides. Position the tool in the small recess beneath the pin, gently push downward and laterally to free the pin's end. Repeat on the opposite side. Insert the new strap by threading one pin end through the lug hole first, then press the opposite end until it clicks into place.

Yes, any strap with a 22mm lug width is compatible with the 85237AA51.BVA35, provided the lug holes accommodate the correct pin thickness (typically 3.5mm or 4.5mm). Always verify that the anchor pins seat firmly in the case lugs and that the strap shows no micro-deformations.

A high-quality calf leather strap with vegetable tanning typically lasts 3–5 years with moderate daily wear. Longevity depends on direct sunlight exposure, humidity, and frequency of water contact. Leather will develop natural patina—this is part of its character. FKM rubber lasts longer (5–8 years), whilst alligator, if properly maintained, can exceed 10 years.