Breitling · Montbrillant

Strap for Montbrillant Datora

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter43 mm
ReferenceR2133012Q578731P
FamilyMontbrillant
MovementBreitling caliber Caliber 21 Hours, Minutes, Small Seconds, Day / Night Indication | Date, Day, Month | Chronograph
CaseRed Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Montbrillant R2133012Q578731P

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Montbrillant R2133012Q578731P, seen from the bench

The Breitling Montbrillant Datora R2133012Q578731P is a 43 mm Red Gold chronograph from the Montbrillant line, named after the Geneva street where Léon Breitling opened his first shop in 1884. It features the Breitling Caliber 21 automatic movement with chronograph function, complete calendar, day/night indication, and tachometric scale. The 22 mm lug width is structurally integrated to the case diameter and weight, ensuring visual balance and proper fit without compromise.

Frequently asked questions

What is the lug width of the Breitling Montbrillant R2133012Q578731P?

The lug width of the Breitling Montbrillant R2133012Q578731P is 22 mm. This is a structural measurement specific to this model and must be respected precisely: even half a millimetre of deviation can compromise the strap fit and risk scratching the red gold case surfaces.

What is the best strap for the Breitling Montbrillant R2133012Q578731P in red gold?

For a red gold case such as the Montbrillant R2133012Q578731P, a cognac or tobacco alligator strap is the most coherent choice: the reptile texture echoes the geometry of the dial and develops a personal patina over time. Alternatively, vegetable-tanned Tuscan calfskin offers a high-level artisanal finish. A red gold deployant clasp completes the ensemble without chromatic interruption.

How do you change the strap on a Breitling Montbrillant R2133012Q578731P?

To replace the strap on the Montbrillant R2133012Q578731P, use a fine-tipped or lever-style spring bar tool. Compress the spring bars gently — on a red gold case, it is advisable to protect the lugs with a soft cloth to prevent scratches. The operation takes only a few minutes but must be carried out carefully to avoid damaging the precious surfaces.

Are there aftermarket straps compatible with the Breitling Montbrillant R2133012Q578731P?

Yes, numerous artisan manufacturers produce 22 mm straps compatible with the Breitling Montbrillant R2133012Q578731P. On milanostraps.it you will find a curated selection in leather, rubber and textile. Compatibility is guaranteed by the 22 mm lug width and standard length: a quality aftermarket strap can equal or surpass the aesthetic result of the original.

How long does a leather strap last on a Breitling Montbrillant?

The lifespan of a leather strap on a Breitling Montbrillant depends on the type of leather, frequency of use and exposure to perspiration and moisture. A quality alligator strap with vegetable tanning and hand-finished edges can last between 3 and 7 years with ordinary care. Vegetable-tanned calfskin offers a similar lifespan. High-end straps from milanostraps.it carry an 18-month warranty against manufacturing defects.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only