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. That is why water-resistance cannot be permanently guaranteed. If used intensively in water, we recommend having annual water-resistance check conducted. Whatever the case, such an appraisal will be done every two years. This operation, which takes only a few minutes, may be conducted by a Breitling authorized maintenance center, or by an authorized dealer (www.breitling.com).
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.
The variable tachometer enables one to determine an average speed whatever the distance covered, the time elapsed or the speed reached. It is however an approximate measurement device.
The variable tachometer is composed of a fixed scale (a) and a mobile scale or disc (b). The fixed scale is read off clockwise, and the mobile disc in the opposite direction. The graduations between two numbers represent tenths of units. To read off a result, the decimal point must be placed correctly. For example, the figure 3.2 may represent 0.32, 3.2, 32, 320, etc. The fixed scale comprises three reference marks:
Your BREITLING chronometer
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.