Breguet
Classique 5140BB/12/9W6— lug 18mm

The Breguet Classique 5140BB/12/9W6 is fitted with an 18mm lug width. This measurement is taken by inserting a caliper between the case lugs at the strap attachment point. Compatible straps are those with 18mm width at the lugs, often tapered to 16mm toward the buckle to maintain elegant proportions.

For the white gold case of the 5140BB/12/9W6, the most suitable strap is polished alligator with symmetrical scales, ideally in midnight blue or havana brown. The natural texture of the reptile skin complements the guilloché dial. Alternatively, polished box-calf leather develops a refined patina over time that aligns perfectly with Breguet's neoclassical aesthetic.

Strap replacement requires a dual-pronged spring bar tool to remove the spring bars from the case lugs. It is recommended to work on a scratch-resistant mat with adequate lighting to avoid damaging the white gold surfaces. If you lack experience, it is preferable to consult a watchmaker or the Casati Milano atelier, which offers installation service by appointment.

Yes, all straps measuring 18mm with standard spring bar attachment are compatible with the Breguet Classique 5140BB/12/9W6. Milano Straps offers a selection of handcrafted 18mm straps made from alligator leather, calf, and other premium materials, produced to the same quality standards as manufacturer straps but with greater customization freedom in color, finish, and stitching.

The lifespan of a leather strap depends on material quality, care, and frequency of use. A high-quality alligator strap, worn in rotation with other pieces and kept away from excessive moisture and perspiration, can last 3 to 6 years while maintaining structural and aesthetic integrity. Milano Straps guarantees its 18mm straps for 18 months against manufacturing defects from the delivery date.