Strap for Montbrillant 01 Red Gold / Mercury Silver / Calf

The lug width of the Breitling Montbrillant RB013012.G736.428X is 20 mm, measured internally between the two lugs using a calliper placed as close to the case as possible. This measurement is essential for selecting a compatible strap that fits without lateral play or friction against the lugs.

For the red gold version of the Montbrillant, the most coherent choice is a Louisiana alligator strap with vegetable tanning in dark tobacco or bordeaux tones: the natural grain develops a patina that complements the chromatic warmth of the red gold. Shell cordovan is a strong alternative, offering a compact, long-wearing texture. A pin buckle or a deployant clasp in matching red gold completes the pairing with formal consistency.

The strap is replaced by operating the spring bars that connect it to the case lugs. Use a fine-tipped spring bar tool inserted into the dedicated hole on the bar or between the lug and strap to compress the spring and release the end. On a red gold case, it is advisable to protect the lugs with a soft cloth during the operation to avoid scratches. The process takes approximately two minutes for an experienced hand.

Yes: any strap with a 20 mm attachment and standard spring bars is technically compatible. It is however important to check the profile of the strap end — ideally slightly tapered — to accommodate the internal curvature of the Montbrillant lugs. Milanostraps.it offers a selection of handcrafted 20 mm straps in various materials, all compatible with this reference.

The lifespan of a leather strap depends on the material, frequency of use, and care. A quality vegetable-tanned alligator strap worn daily typically lasts 2–4 years before showing structural wear at the closure fold. Shell cordovan, being more compact and less porous, tends to last longer. Prolonged exposure to perspiration, water, and UV rays accelerates deterioration: it is advisable to rotate between two straps and periodically apply a neutral leather conditioner.