Strap for Montbrillant 01 Red Gold / Mercury Silver / Calf

The lug width of the Breitling Montbrillant RB013012.G710.431X is 20mm. This measurement should be taken with a digital calliper positioned between the inner faces of the lugs, parallel to the case. Only straps with a 20mm attachment ensure correct mechanical retention and a profile that is aesthetically consistent with the case proportions.

For an 18-carat red gold case such as that of the Montbrillant, the most suitable materials are vegetable-tanned alligator with belly grain — polished or semi-polished — and shell cordovan in cognac or bordeaux tones. Box-calf leather is a valid alternative for those preferring a more understated style. A deployant clasp in red gold or champagne PVD is recommended for metallic consistency and to protect the strap from buckle wear.

The strap on the Montbrillant is secured to the lugs via standard 20mm springbars. Replacement requires a springbar tool: insert the forked tip into the lateral slot of the springbar, compress the spring, and release the strap. The operation does not require opening the case or any intervention on the movement. It is nonetheless advisable to entrust the procedure to a watchmaker to avoid scratches on the gold case.

Yes. Any strap with a 20mm attachment is technically compatible with the Montbrillant RB013012.G710.431X. MilanoStraps offers a selection of handcrafted straps in 20mm, made from alligator, calf leather, shell cordovan and rubber, with customisable stitching and linings. For a red gold case, it is recommended to pair the strap with a buckle or deployant clasp in a warm metal finish (gold or champagne PVD) to maintain aesthetic coherence.

The lifespan of a leather strap depends on the material, tanning method and conditions of use. A quality vegetable-tanned alligator strap, used with care and stored in a dry environment, can last between 3 and 7 years while retaining its structural integrity and aesthetic appeal. Shell cordovan is particularly resistant to deformation and surface moisture. To maximise longevity, it is advisable to rotate between two straps and avoid wearing the watch during intense physical activity or water exposure.