Strap for Montbrillant 01 Stainless Steel / Mercury Silver / Bracelet

The Breitling Montbrillant AB013012.G735.448A has a lug width of 20mm. This measurement is taken internally between the lugs using a digital calliper or a millimetre ruler. It is one of the most common widths in the chronograph segment, compatible with a wide range of quality aftermarket straps.

For the Montbrillant with its silver dial and satin-brushed stainless steel case, a vegetable-tanned alligator strap — ideally in midnight blue, tobacco or matte black — is the most coherent choice with the model's aeronautical-elegant character. Alternatively, a smooth padded calf leather or nylon NATO strap suits daily wear. All options must feature a 20mm lug width.

Replacing the strap requires a spring bar tool (lever or pin type). The 20mm spring bars must be compressed laterally to release the strap from the lugs. This can be done independently with the correct tools, or entrusted to a watchmaker or the Casati Milano atelier to ensure the case surfaces are fully protected.

Yes. Any strap with a 20mm lug width is technically compatible with the Montbrillant AB013012.G735.448A. Milanostraps.it offers a curated selection of handcrafted straps in leather, alligator, shell cordovan and technical materials, specifically tailored to Breitling chronographs, with steel buckles and deployant clasps matching the original case finish.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily use. A high-grade alligator or vegetable-tanned calf strap, with basic maintenance (conditioning cream every 2–3 months, rotation with other straps), can last between 3 and 6 years while retaining structural integrity and a dignified patina. Casati Milano straps carry an 18-month warranty against manufacturing defects.