Breguet
Classique Complications 5447BR/1E/9V6— lug 18mm

The lug width of the Breguet Classique Complications 5447BR/1E/9V6 is 18 mm. This is the measurement to use when selecting any compatible aftermarket or bespoke strap for this reference. To confirm, measure the inner spacing between the lugs with calipers on the inside of the case.

For the rose gold case and guilloché dial of the 5447BR/1E/9V6, a belly alligator strap with cognac brown or burgundy bombé grain is the most aesthetically coherent choice. Smooth box-calf leather with patina is an excellent formal alternative for those preferring more understated materials. Both should feature a taper from 18 to 16 mm.

The strap is replaced using a fine-pointed or spatula-style spring bar tool, inserting it into the lateral notch of the lug to compress the spring bar and slide it out. Given the thinness of the case and the value of the piece, it is recommended to entrust the work to a qualified watchmaker or specialized atelier such as Casati Milano to avoid scratches on the rose gold case.

Yes. Milano Straps offers a selection of 18 mm handcrafted straps compatible with the Breguet Classique Complications 5447BR/1E/9V6, made from alligator, calf leather, and other fine leathers. For bespoke requirements—hand-selected leather, custom stitching, made-to-order buckle—the Casati Milano atelier produces straps by appointment with an 18-month warranty.

A handcrafted quality leather strap, if properly maintained, typically lasts between 2 and 4 years with daily wear. Durability depends on exposure to sweat, humidity, and direct sunlight. LVMH or Hermès tannery alligator tends to resist aging better over time compared to calf leather. Avoid contact with water and fragrances, and store unused straps in a dry environment.