Mechanical Watches
Mechanical watches are the traditional "wind-up" or analogue watches with numbers or marked dials and moving hands. They are powered by a mainspring and operate via a series of interlocking wheels and gears. To set the gears in motion, mechanical watches must either be wound automatically or by hand.
Automatic Watches
An automatic watch has a mechanical movement but it does not need to be regularly wound. The automatic watch is wound continuously as the owner wears it: when the wrist moves, a rotor, or weight, inside the watch drops by the force of gravity, causing the mainspring to be wound. Since the mainspring of an automatic watch maintains full tension for a longer period of time than a hand-wound watch, it has greater consistency of power and, therefore, greater accuracy. If the watch is not worn for a consistent period of time, then the correct time will need to be reset.
Quartz Watches
A quartz watch is battery-powered watch. The baterry causes the quartz to vibrate and a computer chip translates these vibrations into the display (digital or analogue).
Water Resistance
Most watches on the market are water resistant to some degree. A watch should be marked "water resist" to confirm its level of resistance to moisture, as there are several degrees of resistance.
Water resistant: It is wearable if water is being splashed, but it should not be exposed to any water pressure. It is protected from perspiration or accidental immersion in water.
Water resistance 50 metres (150 feet) or 5 ATM: It is wearable around household sinks, while playing sports, and in shallow water. It should not be worn while scuba diving.
Water resistance 100 metres (333 feet) or 10 ATM: It is wearable around household sinks, while playing sports, and while swimming or poolside diving. It should not be worn while scuba diving.
Water resistance 300 metres (990 feet) or 30 ATM: It is wearable around household sinks and while playing sports, swimming, and scuba diving at depths not requiring helium gas.
Watch Care
Watches can easily be soiled by sweat or dirt. To keep them clean, wipe the face, case, or band regularly with a soft cloth, paying special attention to the back of the case. Leather bands should be wiped with a soft cloth, but metal bands can be cleaned with soapy water and a soft brush. Watches should not be left in extreme temperatures, as this could damage the watch or shorten the lifespan of its battery. If your watch is an analogue quartz watch, do not expose it to magnetism--it may temporarily stop working or show a time loss or gain. To sustain water resistance, have your watch checked regularly and maintained according to manufacturer instructions.
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