Génie 02 AIRGénie 02 AIR

Top Summary

The Breva Génie 02 Air combines the stunning sophistication of a beautifully crafted mechanical timepiece with the practicality of a fully functional, high-performance altimeter.

The Génie 02 Air is a limited edition of 55−pieces in titanium G5 and is available with calibrations in either meters or feet.



The dial side of the timepiece is dominated by a sub-dial at 8 o’clock displaying hours and minutes, and the precision altimeter sub-dial at 2 o’clock displaying meters (or feet). Arcing around the top of the dial is the large-scale altitude indicator, which displays up to 5,000 meters (or 16,400 feet), with small seconds below. At 4 o’clock, an indicator is revealed when the air valve is open or closed (it must be open to indicate the altitude). Below is the 65-hour power reserve indicator.

The aneroid capsules in the Génie 02 were especially developed to Breva’s specifications to optimize their precision and use in a wristwatch. The capsules are made from a special non-magnetic memory metal (a Breva-patented invention), which is lighter and stronger than aluminum and has twice the ductility of steel. The capsules are exposed for long durations to high temperature and pure oxygen to maximize thermal conductivity and oxidation resistance. The Génie 02’s aneroid capsules were developed specifically for registering air pressure for altitude readings rather than barometric pressure, and are different from those used on the Génie 01.

A lever, clearly visible on top of the aneroid capsules, transmits the combined height of the capsules through a complex system of gears and racks to the two precision, large-scale altimeter indications. The gearing for these two displays has been carefully calculated to optimize both precision and legibility.



Three chevron-engraved crowns wind, set, adjust, and operate the functions of the Génie 02:

a. 9 o’clock: a two-position crown both winds the movement and sets the time.

b. 2 o’clock: a screw down crown rotates both the altitude’s precision-scale and large-scale to adjust for variations in air pressure, which affects altitude readings.

c. 4 o’clock: a screw down crown either seals air out of the movement or allows it in (for altitude function). Longevity and reliability of the timepiece are maximized by means of an osmotic Teflon membrane that filters any moisture and humidity from air before it enters the movement. Just above the crown, a white band on the dial marked “SEALED” warns when the valve is unlocked.

Turning the Génie 02 Air over allows the complexity of beautifully finished 415-component movement to be more fully appreciated. The movement is framed by the code names of many of the world’s airports, engraved around the perimeter of the caseback along with their altitudes above sea level: GVA−430M¬, HND−6M¬; SYD−9M¬; JFK/LHR−24M; SIN−7M; DXB−19M; HKG−9M; LAX−38M; GYD−3M; CDG−119M; BCT−4M; CVF−2008M¬; OLB−37M; IBZ−6M; MIA−2M¬; KUL−22M¬; LTT−18M¬; CGK−10M¬¬; BGI−52M. How many of these airports do you recognize?



An air pressure altimeter is in fact a barometer developed specifically to display altitude rather than barometric pressure. Pressure in the earth’s atmosphere is a result of the weight of the air pulled down by gravity. The higher the altitude, the less atmosphere above, so less pressure is exerted.
Atmospheric pressure can change with weather, and this can affect altitude readings. When bad weather approaches, air pressure can fall, causing the altimeter in the timepiece to confuse this decrease in pressure with an increase in altitude.

In order to compensate for weather- or temperature-induced barometric pressure variations, the altimeter should be calibrated by using a known altitude or a known pressure value. A known altitude can typically be taken from a specific landmark on a topographic map. If a known altitude is not available, a known pressure value will suffice. Barometric pressure is measured several times per day and can usually be obtained from aviation weather reports.

Technical Specifications

Hours, minutes, small seconds, large-scale altitude indicator, precision-scale altitude indicator, power reserve indicator, air pressure valve, equalizer seal indicator, altitude scale adjuster.    

Case, Dials and Strap:
Case material: black titanium G5
Dimensions:  44.70 mm x 16.10 mm
Number of components: 88
Crowns: winding setting crown at 9 o’clock, altitude corrector at 2 o’clock, air valve at 4 o’clock
Crystals: sapphire crystal and display back treated with anti-reflective coating on both sides
Dials: grained and galvanized nickel silver indexes and numbers in three-dimensional Super-LumiNova
Altitude scales: available in metric (meters) or imperial (feet) measurements
Water resistance: 30 m
Air valve with Teflon moisture-resisting osmosis membrane
Strap and buckle: natural rubber strap with titanium tang buckle
Calibrations: altitude calibrations available in either meters or feet 

Proprietary movement developed exclusively for Breva by Jean-François Mojon/Chronode
Diameter: 38.10 mm
Number of components: 415
Number of jewels: 45
Balance frequency: 4 Hz
Dual aneroid capsules specifically developed to derive altitude from air pressure
Power reserve: 65 hours