Strap for Equestrian 23.5 Diamond / MOP

The lug width of the Longines Equestrian L6.129.0.87.2 is 10 mm, a non-standard dimension characteristic of vintage models from the 1960s–70s. To verify, measure the distance between the two spring bars on the internal surface of the lugs using a calliper. This specific sizing requires bespoke straps, as contemporary aftermarket options typically focus on 18, 20 or 22 mm specifications.

Alligator is the most elegant choice, as its geometric grain complements the rectangular case geometry perfectly. Vegetable-tanned calf leather develops a natural patina that ages gracefully, whilst shell cordovan is semantically aligned with the model's equestrian identity. For daily wear, a vulcanised rubber strap with a stainless steel deployante is versatile and practical. Your choice depends on the intended context: formal, business casual or sporting.

Strap replacement is accomplished by removing the spring bars connecting the lugs to the strap. Position the watch face-down on a soft surface. Using a spring bar tool or thin blade, gently press inward on one spring bar and extract the old strap. Repeat on the opposite side. Align the new 10 mm strap with the lug holes and reinsert the spring bars until they click into place. Verify stability before wearing.

Yes, Milano Straps offers a comprehensive collection of 10 mm straps customisable in leather (alligator, calf, shell cordovan) and other materials, ready for immediate dispatch. For a bespoke experience, the Casati Milano atelier crafts custom straps with personal leather selection, WhatsApp updates and an 18-month guarantee, ensuring maximum compatibility and artisanal quality.

A high-quality artisanal leather strap, such as those in alligator or vegetable-tanned calf, typically lasts 5–8 years with regular use, provided proper maintenance. Vegetable-tanned leather ages particularly well, developing a rich patina. Daily use, humidity exposure and sunlight accelerate wear. Casati Milano's 18-month guarantee covers manufacturing defects, whilst natural ageing is considered part of the piece's character.