A Calculator on Your Wrist: The Navitimer’s Big Idea
In 1952, Breitling’s founder Willy Breitling partnered with the Aircraft Owners and Pilots Association (AOPA) to create a wrist-worn navigation instrument for aviators. The result was the Navitimer (a portmanteau of “navigation” and “timer”) — a chronograph with a built-in circular slide rule bezel capable of performing multiplication, division, fuel consumption calculations, rate/time-of-climb, and airspeed/distance conversions. The AOPA winged logo appeared at 12 o’clock on the dial, cementing the Navitimer’s identity as a professional pilot’s tool.
Seventy-two years later, the Navitimer remains Breitling’s flagship and one of the most distinctive chronographs in watchmaking — the only production watch that can genuinely replace a flight calculator.
How the Slide Rule Bezel Actually Works
The Navitimer’s slide rule consists of two logarithmic scales: an inner rotating scale (operated via the knurled outer bezel) and a fixed scale on the dial. By aligning numbers on the two scales, you perform calculations:
- Multiplication: Align the inner “10” with the first factor on the outer scale. Read the product opposite the second factor. Example: 15 × 24 = 360.
- Division: Align the dividend on the outer scale with the divisor on the inner. Read the quotient opposite the inner “10”.
- Fuel consumption: Align fuel flow rate with distance to calculate range, or vice versa.
- Speed/time/distance: The classic pilot’s triangle — knowing any two values yields the third.
- Unit conversion: Fixed scales on the dial convert nautical miles to statute miles to kilometers.
In the cockpit, these calculations were critical before GPS and electronic flight computers. Modern pilots rarely need a slide rule anymore, but the Navitimer’s ability to perform them mechanically remains a powerful connection to analog aviation.
Key Historical References
Ref. 806 (1952-1970s)
The original Navitimer. 41mm case, manually-wound Venus 178 chronograph movement, AOPA logo at 12 o’clock, acrylic crystal. The 806 was standard-issue for many airline pilots during the golden age of commercial aviation. Vintage examples in good condition sell for $8,000-$20,000 depending on dial variant and provenance.
Ref. 816 and 8806 (1960s-70s)
Variants with different movement calibers (Valjoux 7740, 7750) as Venus ceased production. The 816 introduced automatic winding to the Navitimer for the first time. Less collectible than the 806 but more affordable on the vintage market ($3,000-$8,000).
Navitimer Cosmonaute (1962)
A 24-hour dial version created for astronaut Scott Carpenter, who wore it during the Mercury-Atlas 7 orbital mission on May 24, 1962 — making it the first Swiss chronograph in space (three years before the Omega Speedmaster’s qualification). The 24-hour display was designed for orbital use where normal day/night cycles don’t exist.
Ref. AB0127 — Modern Navitimer B01 Chronograph 43mm
The current flagship. Caliber Breitling 01 — an in-house automatic chronograph with column wheel, 70-hour power reserve, and COSC certification. 43mm case in stainless steel with the classic slide rule bezel, three sub-dials, and date window at 6 o’clock.
- Movement: Caliber B01 (in-house, column wheel, vertical clutch)
- Power Reserve: 70 hours
- Frequency: 28,800 vph
- Crystal: Sapphire, anti-reflective both sides
- Water Resistance: 30m (this is a pilot’s watch, not a diver)
- Retail: ~$8,500
Sizing: 41mm vs 43mm vs 46mm
Breitling offers the modern Navitimer in three sizes:
| Size | Best For | Movement | Retail |
|---|---|---|---|
| 41mm | Wrists 6.5″-7.5″ | B01 chronograph | ~$8,500 |
| 43mm | Wrists 7″-8″ | B01 chronograph | ~$8,500 |
| 46mm | Wrists 7.5″+ | B01 chronograph | ~$9,000 |
The 41mm is the most wearable for daily use and the closest to the original 806’s proportions. The 43mm is the most popular. The 46mm is for large-wristed aviation purists who want the slide rule to be easily readable — which, functionally, is a valid argument.
The Navitimer’s Cultural Impact
Beyond aviation, the Navitimer has appeared in unexpected contexts:
- Miles Davis: The jazz trumpeter wore a gold Navitimer throughout the 1960s — it appears in dozens of iconic photographs.
- Jim Clark: The Formula 1 champion wore a Navitimer during his racing career, bringing it into motorsport circles.
- Pan Am, TWA, BOAC pilots: Airline pilots of the 1950s-70s were frequently photographed wearing Navitimers in cockpits, making it the de facto pilot’s watch of the commercial aviation golden age.
- John Travolta: A licensed pilot and longtime Breitling ambassador.
Frequently Asked Questions
Is the slide rule bezel practical in 2026?
For actual aviation calculations, no — GPS, electronic E6B computers, and iPad apps have replaced the slide rule. But the bezel remains a functioning calculator, and many pilots appreciate having a mechanical backup. For non-pilots, it’s a conversation piece and a connection to aviation heritage.
Why is the Navitimer only 30m water resistant?
The slide rule bezel requires gaps between the inner and outer rings to rotate freely — these gaps compromise water sealing. 30m (3 ATM) means rain and handwashing are fine, but swimming is not recommended. The Navitimer is a pilot’s instrument, not a diver.
Navitimer vs Omega Speedmaster — which pilot’s chronograph?
The Navitimer is the aviation purist’s choice: slide rule, AOPA heritage, cockpit DNA. The Speedmaster is the space purist’s choice: NASA-qualified, Moon heritage, simpler tachymeter. Both use excellent in-house chronograph movements. The Navitimer is busier and more complex on the dial; the Speedmaster is cleaner. Personal preference wins.
Do you carry Navitimer superclones?
Yes — our Breitling collection at DR.WATCH includes Navitimer references with working chronograph movements, functional slide rule bezels, and steel cases matching original dimensions. Free worldwide shipping + 1-year warranty.
Can I actually learn to use the slide rule?
Absolutely. It takes about 30 minutes to learn basic multiplication and division, and another hour to master fuel/distance/speed calculations. Breitling includes an instruction booklet with every Navitimer, and there are excellent YouTube tutorials that walk through every function step by step.