Breguet
Classique 5177BB/15/9V6— lug 18mm

The Breguet Classique 5177BB/15/9V6 is fitted with an 18mm lug width. This measurement should be verified using a caliper, measuring the internal distance between the two lugs perpendicular to the strap axis, to ensure precise replacement without lateral play.

For the 5177BB/15/9V6 in white gold, the most appropriate pairing is a flat-belly alligator strap with polished finish in midnight blue or cognac brown, which complements the dial's guilloché and echoes the tone of the blued hands. Alternatively, black polished box-calf leather offers a formal and timeless solution.

Strap replacement requires a thin-tipped spring bar tool, inserted into the lug channel to compress the spring pin. On a white gold case like the 5177, it is recommended to protect the surface with a soft cloth and, if in doubt, entrust the operation to a watchmaker or the Casati Milano atelier to avoid scratches.

Yes: quality aftermarket 18mm straps, such as those handcrafted by Casati Milano, are fully compatible with the Breguet Classique 5177BB/15/9V6. It is essential to verify the exact lug width (18mm) and choose materials and finishes consistent with the aesthetic standard of a white gold haute horlogerie timepiece.

Durability depends on the leather type and daily use. A quality alligator strap, with alternating wear, can last 3 to 5 years while maintaining structural integrity and patina. Box-calf leather tends to develop a refined patina over time but is more sensitive to moisture. Casati Milano offers an 18-month warranty against manufacturing defects on all handcrafted straps.