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VARIOUS INFORMATION
Mechanical watches
The mechanical Claude Bernard watch with an automatic movement does not need to be wound by hand. The
motion of your wrist makes the rotor (oscillating weight or mass) turn, thereby winding up the mainspring of the
watch movement. The everyday activity of life is sufficient in itself to wind up an automatic Claude Bernard watch
and it will run continually, even if it is removed at night. However, if not worn for approximately 40 hours, it will
stop. To make the watch work again, turn the crown clockwise about 20 times. Now set the time and if possible
the date, etc.
Mechanical watches accuracy
Depending on the movement, the daily tolerance of a mechanical watch can be of 30 seconds. If you notice a
bigger tolerance rate, you can have your watch adjusted at a service center in your country, free of charge within
the guarantee period.
Tachymeter scale
Some Claude Bernard Chronograph watches have a tachymeter scale. With this scale it is possible to measure
the speed. The distance is 1 km. To measure the elapsed time press the start/stop button when the vehicle
(power-boat) passes the starting and the final point or target. The figure shown by the hand on the tachymeter
scale indicates the average speed in kilometers. If for instance a car covers a 1 km distance in 30 seconds, you
can consider it to an average speed of 120 km per hour.
Water resistance
All Claude Bernard timepieces are water-resistant from 30 to 220 meters. Check the details on the back of your
Claude Bernard timepiece and read the following instruction carefully.
Water resistant to 30 meters (100 feet / 3ATM). Will withstand rain or splashes of water and accidental
immersion, but should not be worn when showering, swimming or diving.
Water resistant to 50 meters (165 feet / 5 ATM). Suitable for showering or swimming in shallow waters.
Water resistant to 100 meters (330 feet / 10 ATM). Suitable for swimming or snorkeling.
Water resistant to 220 meters (660 feet / 22 ATM). Suitable for swimming or snorkeling.
The water resistance of your timepiece cannot be guaranteed indefinitely, considering that joints may age, crowns
or pushers may sustain knocks and climate or temperature may vary. We therefore recommend that you have
the water resistance of your timepiece checked every 2 years or whenever the timepiece case is opened.
Leather straps
Original Claude Bernard leather straps are clearly marked on the buckle and on the reverse side. Claude Bernard
uses a large variety of calfskin leather straps with imprinted patterns of different animals. Leather straps should
not be used by individuals with strong perspiration or by those who stay for long periods in a humid climate.
Leather straps are not covered by the international Claude Bernard warranty.
Screw-down crown
Screw down the crown carefully to prevent water from penetrating the mechanism.
PVD (Physical Vapour Deposition)
the modern technologies and intended for fields of application such as the aeronautics, the automobile, the
surgery, the electronics.
Stainless steel 316L
The stainless steel used for Claude Bernard cases and bracelets appears among the best alloys at the moment
(316L. It is obtained by a special cast iron which guarantees an extreme robustness and excellent antimagnetic
properties. Its low content in carbon makes it particularly resistant to the corrosion.
Automatic watches
Claude Bernard 80
Watch functions:
The crown has 3 positions:
