Breguet
Classique 5177BB/12/9V6— lug 18mm

The Breguet Classique 5177BB/12/9V6 is fitted with an 18 mm lug width. This is the internal measurement to be taken with a digital caliper in the groove between the two lugs, and it is the fundamental parameter for choosing a compatible strap.

For the white gold case and guilloché dial, the most suitable strap is in smooth belly or hornback alligator, preferably in black, midnight blue or tobacco brown. The crocodile naturally complements the texture of the guilloché. For a more formal version, polished box-calf veal is an excellent alternative with a beautiful patina over time.

The strap is replaced using a dedicated springbar tool with a thin tip, inserted into the lateral hole of the lug to compress the spring bars. It is recommended to rely on a watchmaker or the Casati Milano atelier to avoid scratches on the white gold case, a relatively soft material prone to marks.

Yes. Any strap with an 18 mm attachment is technically compatible. On milanostraps.it artisanal straps selected to fit this reference are available, with lengths and thicknesses designed for Breguet lugs. It is also possible to order a bespoke strap through the Casati Milano atelier with custom specifications.

The durability depends on the quality of the leather and usage. A top-grade alligator strap with leather sole and correct finishing lasts on average 2-4 years with daily use. Box-calf veal has a similar lifespan but develops an interesting patina over time. Avoiding prolonged contact with water and sweat significantly extends the life of the strap.