Breguet
Classique Complications 7639BB/6D/9XV/DD0D— lug 18mm

The lugs of the Breguet Classique Complications 7639BB/6D/9XV/DD0D measure 18mm in internal width. This measurement is taken with a millimeter ruler inserted between the two lug corners at the case attachment point, at the narrowest section.

A bombé alligator strap — preferably in midnight blue or polished black — is the most coherent choice for this watch's aesthetic register. The symmetrical scale texture of the crocodile visually complements the guilloché dial and enhances the 18-karat white gold case. Alternatively, a fine-grain calf leather in anthracite gray or burgundy offers elegance with a patina that improves over time.

The strap is removed using a lever-type or pointed spring bar tool, inserted into the spring bar hole positioned between the lugs. For a watch in this category, it is recommended to entrust the task to a watchmaker or specialized atelier to avoid scratches on the white gold case and damage to the diamond bezel. Casati Milano offers this service at their Milan atelier by appointment.

Yes. Any strap with an 18mm lug width and standard spring bar is compatible with the Breguet Classique Complications 7639BB/6D/9XV/DD0D. Milano Straps offers a selection of 18mm artisanal straps made from carefully selected leathers, with bespoke options through the Casati Milano atelier for those seeking a custom-made strap for this specific model.

A high-quality artisanal alligator or calf strap, if worn with rotation and kept away from prolonged exposure to moisture and perspiration, has an average lifespan of 2–4 years with regular use. The patina that develops over time is part of the piece's aesthetic value. Milano Straps guarantees their straps for 18 months against manufacturing defects; normal wear does not fall under this warranty.