Breitling Montbrillant Datora

Offered for sale is an exceptionally elegant Breitling Montbrillant Datora Ref. A21330, preserved in remarkably well-maintained condition and accompanied by its complete original full set from 2005.

The Montbrillant Datora represents one of the most refined and technically interesting creations produced by Breitling during the modern revival of its historic aviation-inspired collections. While Breitling is primarily known for its professional pilot chronographs and robust sports watches, the Datora occupies a very special position within the brand’s catalogue by combining the legendary Navitimer design language with an impressive full calendar chronograph complication.

Inspired by Breitling’s historic Huit Aviation Department and the original Montbrillant watches of the 1940s and 1950s, the reference A21330 successfully blends vintage aesthetics with contemporary proportions and reliability. The result is a watch that feels significantly more sophisticated and dress-oriented than the traditional Navitimer, while still retaining all the visual DNA that has made Breitling one of the most recognizable names in aviation watchmaking.

This particular example dates from 2005 and is offered as a complete full set. The watch has been worn over the years but remains in extremely good overall condition, clearly having been carefully maintained by its previous owner. The case retains strong proportions, the dial remains beautifully preserved, and the watch presents exceptionally well on the wrist. The original brown crocodile leather strap further enhances the warm and classic appearance of the watch and perfectly complements the vintage-inspired character of the Datora.

The stainless steel case measures approximately 43 mm and features the iconic circular slide rule bezel, one of the defining elements of Breitling’s aviation chronographs. Originally developed for pilots to perform in-flight calculations, the slide rule remains one of the most recognizable and historically important complications in watchmaking. Combined with the highly detailed dial layout, it gives the Montbrillant Datora an unmistakably technical yet elegant appearance.

One of the most attractive aspects of the A21330 is undoubtedly its highly complicated dial configuration. In addition to the chronograph function, the watch features a complete calendar display with day, date, month, and moonphase indication. Despite the amount of information displayed, Breitling managed to maintain impressive legibility and visual balance, giving the watch a sophisticated appearance without becoming overwhelming.

Powering the watch is the Breitling Calibre 21, an automatic chronograph movement based on the highly respected Valjoux 7751 architecture. This movement is renowned for its robustness, reliability, and ease of servicing, while offering the additional complexity of a full calendar and moonphase complication. Like all Breitling chronometers of the period, the movement is COSC-certified, guaranteeing excellent precision and reliability in daily use.

The domed crystal, detailed dial execution, applied numerals, and beautifully proportioned subdials all contribute to the distinctive personality of the Montbrillant Datora. Unlike many modern oversized chronographs, the A21330 offers a more classical and refined wearing experience, making it equally suitable for formal occasions and daily wear.

Included with the watch:

Original Breitling presentation box
Original Breitling warranty papers dated 2005
Breitling manuals and documentation
Original accessories supplied at delivery
Complete full set

Specifications:

Reference: A21330
Model: Montbrillant Datora
Year: 2005
Case material: Stainless steel
Case diameter: Approximately 43 mm
Bezel: Circular slide rule bezel
Dial: Full calendar chronograph with moonphase
Movement: Breitling Calibre 21 automatic chronograph
Base calibre: Valjoux 7751
Certification: COSC chronometer certified
Crystal: Sapphire crystal
Strap: Original brown crocodile leather strap
Condition: Worn but in extremely good overall condition
Scope of delivery: Full set

The Montbrillant Datora has become increasingly appreciated by collectors in recent years due to its exceptional value proposition, timeless design, and impressive level of horological complexity. Finding a well-preserved full set example such as this one has become increasingly difficult, especially in this condition and configuration.

The watch is available for inspection by appointment in Belgium. Worldwide insured shipping is available upon request.

Please feel free to contact us for additional photographs, videos, or any further information regarding this exceptional Breitling timepiece.