Breitling - 'Navitimer Montbrillant Datora' - Column Wheel Chronograph - Certified C.O.S.C. - Full Set - Unworn - Ref. No: A21330 - Men - 2007

Welcome to my Top Swiss Chronograps Boutique!

Breitling S.A. was founded in 1884 by Léon Breitling. It's known for precision-made chronometers designed for aviators.
In 1952, Willy Breitling was approached by the world’s largest pilots’ club, the Aircraft Owners and Pilots Association (AOPA), and asked to create a new chronograph for its members. His answer was the Navitimer—a wrist-worn instrument that would enable pilots to perform all necessary flight calculations, including average speed, distance traveled, fuel consumption, rate of climb or descent, and conversion of miles to kilometers or nautical miles. At that time, all these calculations required a logarithmic slide rule.
To create it, Willy adapted the original logarithmic slide rule of the 1940s Chronomat for aviation purposes and integrated it into a rotating bezel, surrounded by small beads to make it easier to manipulate. At 41mm, the case was unusually large for the time, ensuring maximum legibility. Oversized Arabic numerals coated with luminescent radium provided excellent contrast against the black dial. The name “Navitimer”—a combination of “navigation” and “timer”—perfectly captured the essence of the pilot’s tool watch.
The original version designed for AOPA bore no Breitling branding on the dial and was exclusively distributed to AOPA members. In late 1955, the Navitimer was released to the public with the Breitling name and a stylized winged logo distinct from the AOPA version.
In the late 1960s, watch wearers had to choose between an automatic watch and a chronograph, but no one had yet found a way to put the two together. To overcome this challenge, Breitling began the ambitious and visionary development of creating one of the first automatic mechanical chronograph calibers. Developed in partnership with Heuer-Leonidas and Hamilton-Buren and Dubois-Depraz, the Breitling Chrono-matic was launched on March 3, 1969 offering two timepieces in one, a mechanical automatic watch and a chronograph—changing watchmaking history forever.
For over 70 years, the Navitimer has been beloved by aviators and tastemakers in equal measure. Worn by an astronaut in space and the biggest stars on Earth, it is Breitling’s most iconic timepiece. Once a tool for charting a pilot's course, now a companion for all those plotting their personal journeys through life.

Movement:
- automatic Breitling calibre 21
- based on ETA 7751, famous "workhorse"
- certified C.O.S.C. chronometer
- power-reserve 42 hours
- 25 jewels
- frequency: 28.800 A/h, 4 Hz
- day/night indication
Case:
- 316L stainless steel
- polished
- 43mm excl. crown, 45,9mm incl.
- thickness: 14,1mm
- length: 51mm lug to lug
- unique No: 2*****9 (for buyer only), best proof of authenticity
Crystal:
- anti-reflective sapphire
Dial:
- noble white
- pointer date with a red crescent at the end
- day of the week at 11:00 o'clock
- month at 01:00 o'clock
- moonphase
- circular slide rule bezel
- polished luminous hands
- polished hour batons
- luminous hour markers
- three chronograph sub-dials:
small-seconds at 09:00 o'clock
12 hours counter at 06:00 o'clock
AM/PM at 09:00 o'clock
30 min. totalizer at 12:00 o'clock
- minutes and seconds markers around inner rim
Bezel:
- 316L stainless steel
- polished
- fluted
- bidirectional rotating
- info inside
Pull/push crown:
- 316L stainless steel
- polished
- Breitling raised logo shield
- two polished chronograph pushers
Case-back:
- 316L stainless steel
- polished with engravings
Bracelet:
- black leather with chic white stitches
- genuine Breitling
- length: ca. 22cm incl. wristwatch itself
- width: 22mm by lugs, 18mm by clasp
Folding clasp:
- 316L stainless steel
- polished
- Breitling logo
Note: Since the strap and clasp are brand new, they are very tight. I recommend taking your watch to a watchmaker to have them adjust the length to fit your wrist.
Weight: 110 grams
Water-resistant: 30meter/3ATM/100feet
Extremelly high recognition value.
Distinctive wellknown super design.
Full set incl. Breitling travel watch box (see pics).
Excellent condition, never worn: the wristwatch comes from Breitling watch-shop showcase.
General professional pre-sale service was made in July 2026: the watch is keeping good time and working perfectly.
My personal authenticity and quality warranty: you will get warranty card (as pictured), fully completed, stamped and signed. My impeccable seller reputation speaks for itself: look at my feedbacks and sales ratings.
Insured, registered shipping worldwide with international express: it’s not cheap, and yet fast and reliable, two days in Europe, three days for the rest of this world.
What you see is what you get. These are my own photos of the actual watch up for auction.

NO EXTRA COSTS for EU Buyers!

Montbrillant Datora, one of the most complicated members of the Navitimer family. It combines the classic aviation slide rule with a full calendar and chronograph, making it one of Breitling's most attractive models.