Care And Maintenance; Recommendations; Water-Resistance; Leather Straps - Hamilton 251.272 Manual De Instrucciones

2. Care and maintenance

2.1 Recommendations

Like all micro-mechanical precision instruments, your Hamilton watch should be checked at least once every two
years. Entrust your watch to an authorized Hamilton repair center or to any other professional watch service. To
keep your watch water-resistant, make sure that its sealing features are tested at every check-up.
Five basic rules for maintaining the water-resistance of your watch
1. Have your watch checked regularly.
2. Do not move the crown when you are in water.
3. Rinse off your watch with fresh water after any immersion in seawater.
4. Dry your watch whenever it gets wet.
5. Have your watch checked for water-resistance by an authorized Hamilton retailer or by any other professional
watch service each time the case is opened.

2.2 Water-resistance

The water-resistance of your watch is indicated on the case back.
Water resistance and pressure equivalent used in Anglo-Saxon countries:
Unit of measure Water resistance categories available
atm (overpressure)
3 5
psi
44 72.5
ft *
100 165
Water resistance and pressure equivalent used in countries using metric systems:
Unit of measure Water resistance categories available
bar 3 5
m * 30 50
* The values given in feet or meters of immersion in water are equivalent to the degree of overpressure applied
during the tests according to the ISO 2281 standard.
4
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10 20 100
145 290 1450
330 660 3300
10 20 100
100 200 1000
© HAMILTON 2010 – INSTRUCTION MANUAL
2. Care and maintenance
2.3 Leather straps
Hamilton recommends that you follow the steps below in order to preserve the condition of your leather strap
for as long as possible:
• Avoid contact with water and dampness to prevent 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 cosmetic
products.
• If you have a problem with your leather strap, please contact your nearest Hamilton retailer.

2.4 Batteries

Watch batteries can last between two and five years, depending on the watch type, its size and the amount of
energy used by the various functions. If the seconds hand starts to move in 4-second steps, the battery should be
changed by your Hamilton agent.
Replacing the battery
We recommend that you contact an approved Hamilton service centre or authorised Hamilton retailer, as they are
equipped with the tools and apparatus required to carry out the work and the necessary checks in a professional
manner. A worn-out battery should be replaced immediately in order to reduce the risk of leakage and conse-
quent damage to the movement.
Battery type
Button-type zinc-silver oxide primary battery cell.
2.5 Magnetic fields
To prevent malfunctions of your watch avoid coming into contact with magnetic fields such as those of magnets,
loudspeakers, cell phones, refrigerators, etc.
© HAMILTON 2010 – INSTRUCTION MANUAL 5