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Learning center
How watches work......Glossary of watch terms ......Automatic watch maintenance.....FAQs
Sizing your watch . .. . Care&Cleaning....................Buying guide ............................Water resistance and watches
 
Care & Cleaning
watch138.com has put together a few simple guidelines to help you care for your watch.Following these simple steps
will help you ensure it's long life.
Water-Resistant Versus Waterproof
A watch marked as water resistant without a depth indication is designed to withstand accidental splashes of water only.
Do not submerge such a watch. Higher levels of water resistance are indicated by increasingly higher acceptable depths,
usually indicated in meters.
There are a variety of ways to make a watch water resistant. All such watches use rubber gaskets or "O" rings to seal the
case back. A watch with a back that screws onto the case provides a higher degree of water resistance.Some crowns
(the "winding stem") actually screw into the case to further increase water resistance.
Usage Recommendations
The following usage recommendations are suggested by the Seiko Corporation of America.
1.Water-resistant to 30 meters (100 feet).Will withstand splashes of water or rain but should not be worn while swimming
or diving.
2.Water-tested to 50 meters (165 feet). Suitable for showering or swimming in shallow water.
3.Water-tested to 100 meters (330 feet). Suitable for swimming and snorkeling.
4.Water-tested to 150 meters (500 feet). Suitable for snorkeling.
5.Water-tested to 200 meters (660 feet). Suitable for skin diving.
6.Diver's 150 meters (500 feet). Meets ISO standards and is suitable for scuba diving.
7.Diver's 200 meters (660 feet). Meets ISO standards and is suitable for scuba diving.
Please note that we do not recommend swimming or diving with your watch unless it has a screw-down crown (also
known as ‘screw-lock' or ‘screw-in' crown) and is water-resistant to at least 100 meters.
Keeping Your Watch Dry
Always make sure your watch is dry after it has been exposed to water. By taking a few minutes and thoroughly drying
your watch with a lint-free cloth, you will prevent rust from forming.This is a key point in ensuring the long life of your
watch.
Caring for the Crystal
The crystal is the transparent part of the watch through which you tell time.As we discussed with water,a watch may have
scratch-resistant crystal,however no crystal is truly scratch proof.Therefore, it is not advisable that you toss your watch
a onto the dresser or into a drawer at the end of the day. It's better for the watch to store or wrap it in a soft cloth before
placing it down.The more care you take with the watch,the less scratches you will end up with.Replace broken or scratched
crystals immediately.Even a hairline crack can let dust or moisture into the mechanism, threatening its accuracy.If you
place the watch in a drawer with other jewelry, this too may scratch the watch, as it might rub against the other pieces.
another suggestion would be to store the watch in its original case,since these cases are generally soft and made
specifically for the watch.
Metal Versus Leather Bands
If you participate in activities that cause excessive sweat or perspiration,you may want to consider getting a watch with a
metal bracelet or rubber strap,instead of a leather strap.Watches that have natural and genuine leather straps will
gradually deteriorate with constant exposure to perspiration. Metal bracelets would best be classified as “dress” watches.
Battery Replacement
Watches that run on batteries are known as 'Quartz' watches.The batteries will last anywhere from one to several years.
How will you know when the watch needs the battery changed? Most of the watches sold by watch138.com come with
free lifetime battery replacement.Send the watch in with your receipt,and watch138.com will replace the battery.if a
watch was not purchased from watch138.com or did not come with free lifetime battery replacement, consider taking it
to a local watch professional for battery replacement.
Watches that do not need battery replacement include automatic (self-winding) watches and solar-powered watches(which
have a rechargeable battery).You may want to consult the watch's manual if you're not sure what type of watch you have.
Cleaning Your Watch
The best way to clean your watch is by using a lint-free cloth and a toothpick. Use the toothpick to clean out any dirt
buildup in the bracelet or casing of the watch and the cloth to wipe it clean. If it is water-resistant, give it an occasional
cleaning with a mixture of warm water and a mild soap. If the strap is leather or non-metal, clean only the case.
Servicing Your Watch
Like any other piece of machinery, a watch must be cleaned, oiled, and serviced. Every couple of years, you may notice
the watch losing time or running fast—or it may stop working altogether. Just take your watch to a local watch
professional for servicing.
Automatic Watch Maintenance
Although automatic mechanical watches do not have batteries,some easy-to-follow maintenance is necessary for
continued and long-lasting good use.
Self-winding automatic watches depend on the movement of the arm to operate and do require some winding,even if you
wear your watch on a daily basis.
If you wear your Automatic watch everyday , it is best to wind it once, every two weeks to keep the wheels in motion and
oil fluid. Simply wind the crown (the same knob used to adjust the time and date) until you meet slight resistance.
If you do not wear your Automatic watch everyday , you should try to wind it at least twice a week to ensure continuous
operation, as well as keeping the inside mechanism in complete running order.
Try to wind your mechanical watch at the same time every day. This is extremely beneficial for the mechanism. You may
want to make it a routine, winding it every morning when you wake up.
Avoid setting the day and/or date (if your watch has these functions) at night. The day-date mechanism is activated during
the nighttime hours and could be disrupted if set at this time.
And, always avoid wearing your mechanical watch, if you are playing a sport requiring continuous arm motion (e.g. tennis,
baseball, golf), since continuous arm motion could damage the movement.