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M044 - INSTRUCTION MANUAL
7
Maintenance of your watch
Recommendations
• Like all micro-mechanical precision instruments,
your Hamilton watch should be checked at least
once every two years. Entrust your watch only to
an authorized Hamilton service center or an official
Hamilton retailer (list available on
www.hamiltonwatch.com).
• To keep your watch water-resistant, make sure that
its sealing features are tested at every check-up.
• Do not move the crown or press the buttons when
you are in water.
• Rinse off your watch with fresh water after any
immersion in seawater.
• Dry your watch whenever it gets wet.
• Have your watch checked for water-resistance by
an authorized Hamilton service center or an official
Hamilton retailer each time the case is opened.
Water-resistance
The water-resistance of your watch is indicated on
the case back.
Metric system and imperial system equivalents of water-
resistance and pressure
Unit of measurement
Categories of water-resistance
bar / atm (pressure) 3 5 10 20 100
m * (meters) 30 50 100 200 1000
psi 44 72.5 145 290 1450
ft * (feet) 100 165 330 660 3300
* The values given in feet or meters of immersion in water are
equivalent to the measurement of pressure applied in tests
according to the ISO 22810 standard.
Leather straps
Hamilton recommends that you follow the steps be-
low in order to preserve the condition of your leather
strap for as long as possible:
• Avoid contact with water and dampness to pre-
vent discoloration and deformation.
• Avoid prolonged exposure to sunlight to prevent
the color from fading.
• Do not forget that leather is permeable. Therefore
avoid contact with greasy substances and cos-
metic products.
• If you have a problem with your leather strap,
please contact your nearest official Hamilton
retailer.
Batteries
Watch batteries can last between 2 to 5 years, de-
pending on the watch-movement type and the
amount of energy used by the various functions.
Replacing the battery
We recommend that you contact an authorized
Hamilton service center or an official Hamilton retailer,
as they are equipped with the tools and apparatus re-
quired to carry out the work in a professional manner.
A worn-out battery should be replaced immediately
in order to reduce the risk of leakage, which might
damage the movement.
Battery type
Button-type zinc-silver oxide battery.
Magnetic fields
To prevent malfunctions of your watch, avoid coming
into contact with strong magnetic fields such as those
of magnets, loudspeakers, etc.