Table on water resistance

The definition of water resistance:

 

My new watch says it is water resistant, but what exactly does that mean? And how do I care for a water resistant watch? A watch marked as water resistant without a depth indication is designed to withstand accidental splashes of water only. You should not submerge such a watch in water at any time. Increasingly higher acceptable depths, normally indicated in meters, usually indicate higher levels of water resistance. There are a variety of different ways to make a watch water resistant. All such watches use "O" rings or rubber gaskets to seal the back of the case. A watch with a back that screws onto the case provides a higher degree of water tightness. Some crowns (the "winding stem") actually screw into the case, which increases water resistance even more.

 

General guideline for water resistant levels:

 

  • - Water Resistant: Will resist moisture from accidental splashing, rain, sweat, etc.
  • - Water Resistant 30M: Will resist moisture and can be submerged, no swimming.
  • - Water Resistant 50M: Will resist moisture and can also be worn while swimming in shallow water.
  • - Water Resistant 100M: Watch may be worn during snorkeling, skin-diving, and swimming.
  • - Water Resistant 200M (or plus): Watch may be worn during standard scuba diving.
  • - Water Resistant 1000M: Watch may be worn for deep sea diving.

 

Watch manufacturers use other terms to measure water resistance:

 

  • - A.T.M. (atmosphere), where 1 A.T.M. equals 10 metres.
  • - Bar, where 1 bar equals 10 metres.

 

Water resistant chart:

 

Water Resistant Chart


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