A chronometer is a high-precision instrument that has successfully passed the entire battery of tests imposed by the COSC (Swiss Official Chronometer Testing Institute), a neutral and independent body which individually tests each movement according to the prescriptions in force.
The certification test for wristwatches with sprung balance oscillators, according to the ISO 3159 norm, consists of observing each movement for 15 days and 15 nights, in 5 positions and at 3 different temperatures (8°, 23°C, 38°C). In order to earn the prestigious chronometer label, a movement’s performances must meet 7 very strict criteria, including a daily variation in rate ranging between only –4/+6 seconds.
The term “chronometer” should not be confused with that of “chronograph”, which is a complicated watch fitted with an additional mechanism enabling the measurement of the duration of an event. A chronograph is not necessarily chronometer-certified, but all BREITLING chronographs carry the much-coveted title of “chronometers”.
Nota bene: mechanical watches endowed with a date, day, month or moon-phase indicator are equipped with a complex mechanism that is set into motion between 8 pm and 3 am. It is therefore vital to avoid adjusting the calendar or moving the time backwards during this period.
The bezel of your watch is fitted with 4 hour-markers called rider-tabs: they are used as points of reference to mark the time of departure or a limit time one wishes to remember.
On models with no chronograph functions, they also serve as “minute chronograph” enabling one to measure time elapsed in minutes.
Rider-tabs make it easier to rotate the bezel by giving a better grip (especially when wearing gloves) and additionally protect the glass.
Your BREITLING chronometer may be used as a sun compass, thus enabling you to determine the Northerly-Southerly direction. For regions that have instated daylight saving time, subtract one hour when directing the watch.
Point the hour hand precisely towards the sun. In relation to the watch dial, the point located midway between the current time and 12 o’clock indicates the South, the North being exactly opposite.
Point the hour-marker located at 12 o’clock on the dial precisely towards the sun. In relation to the watch dial, the point located midway between the current time and 12 o’clock indicates the North, the South being exactly opposite.
Your BREITLING chronometer is equipped with a scale dividing the hour into hundredths, thus making it easier to read off the minutes on a decimal base.
E.g.: 0,6h = 36 minutes.
Your BREITLING chronometer is a sophisticated instrument which is constantly subjected to a wide variety of stresses and strains. Within a very small volume, a large number of components contribute to handling all the functions. Their mechanical action inevitably leads to a certain amount of wear and tear, which may be controlled by maintenance consisting of renewing the lubrication and replacing worn components. Like any precision measurement instrument, your watch must be regularly maintained in order to function at its highest level of potential: we recommend a regular service every two years, while the complete overhaul should be scheduled about every five years. Your authorized BREITLING dealer will be pleased to handle this for you.
The movement of your chronometer is protected by a complex case fitted with gaskets to ensure its water-resistance. Under the influence of various external agents – perspiration, chlorinated or salt water, cosmetics, fragrances or dust – these gaskets gradually deteriorate and must be regularly replaced. If used intensively in water, we recommend that this be done once a year as part of a service. If the watch is only occasionally used in water, this operation may be carried out every two years. Moreover, a water-resistance test should be done every year; it takes only a few minutes and can be performed by your authorized BREITLING dealer.
BREITLING models are water-resistant to varying degrees. The extent of the water-resistance, expressed in meters (M) is a standard value and does not indicate an absolute depth of immersion. The crown and pushpieces must not under any circumstances be operated under water or when the watch is wet. The table below indicates the conditions in which your watch may reasonably be used, according to its degree of water-resistance.
|Activities / degree of water-resistance||3bars / 30M / 100FT||5bars / 50M / 165FT||10bars / 100M / 330FT||50bars / 500M / 1650FT+|
|Shower, swimming, surface water sports||✔||✔||✔|
|Water-skiing, dives, snorkeling||✔||✔|
BREITLING genuine leather straps are crafted with the most refined materials and represent extremely high-quality products. Like all objects in natural skin (shoes, gloves, etc.), their length of life varies considerably, according to the conditions in which they are worn. In particular, water, cosmetics and perspiration accelerate the aging process. A metal or synthetic BREITLING bracelet is thus better suited to activities involving frequent contact with water or humidity.
BREITLING metal cases and bracelets are made from the finest alloys and guarantee sturdiness and wearer comfort. Regular cleaning by rinsing and brushing in clear water will keep your watch shiny. This operation is strongly recommended after each immersion in salty or chlorinated water. For watches fitted with a leather strap, proceed in the same manner, while avoiding getting the strap wet.
Like any valuable objects, BREITLING chronometers deserve special care. It is important to protect them from jarring and knocks by hard objects, and not to expose them to chemical products, solvents, dangerous gases, or magnetic fields. Moreover, your BREITLING chronometer is designed to run smoothly at temperatures ranging between 0°C and 50°C.