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
ReferenceA2130012Q509
FamilyMontbrillant
MovementBreitling caliber 21 hours, minutes, small seconds, day / Night Indication | date, day, month | Chronograph
Year2002
CaseStainless Steel

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 A2130012Q509

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Montbrillant A2130012Q509, seen from the bench

The Breitling Montbrillant A2130012Q509 is a 43 mm stainless steel chronograph powered by the Breitling Caliber 21 movement, featuring hours, minutes, small seconds, day/night indicator, date, day, month, and chronograph function. The watch requires a 22 mm lug width and belongs to the Montbrillant family, which interprets aviation instruments with classical elegance rather than tactical robustness. The dial's hierarchical layout across concentric registers reflects decades of civil aviation instrumentation design.

Frequently asked questions

What is the lug width of the Breitling Montbrillant A2130012Q509?

The lug width of the Breitling Montbrillant A2130012Q509 is 22 mm. This measurement must be taken between the two lugs, flush against the case, using a digital calliper or a millimetre ruler to ensure accuracy before purchasing an aftermarket strap.

What is the best strap for the Breitling Montbrillant A2130012Q509?

For the Breitling Montbrillant A2130012Q509, a vegetable-tanned alligator strap is the most coherent choice, complementing the watch's refined character. A smooth or grained calf leather in warm tones suits everyday wear admirably, while a woven nylon NATO strap works well for casual or summer use.

How do you change the strap on the Breitling Montbrillant A2130012Q509?

To replace the strap on the Breitling Montbrillant A2130012Q509, use a spring bar tool to release the spring bars from the lugs. Rest the watch on a soft cushion to protect the dial and bezel during the operation. Alternatively, a watchmaker or Casati Milano's atelier service can handle the fitting professionally.

Are there aftermarket straps compatible with the Breitling Montbrillant A2130012Q509?

Yes, there are many aftermarket straps in 22 mm compatible with the Breitling Montbrillant A2130012Q509. It is essential that the lug end measures exactly 22 mm and that the strap tapers towards the buckle end (typically 20 mm) to preserve the original proportions. Milanostraps.it offers a curated selection of handcrafted straps specifically suited to this lug width.

How long does a leather strap last on the Breitling Montbrillant A2130012Q509?

The lifespan of a leather strap for the Breitling Montbrillant A2130012Q509 depends on the material and care applied. A quality vegetable-tanned alligator strap, properly maintained, lasts between 3 and 5 years with daily wear. Shell cordovan, owing to the density of its fibres, can exceed 5 years. Avoiding prolonged exposure to water and perspiration significantly extends the strap's life.

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