If you are choosing a wristwatch to swim or dive with, you must not think that any waterproof watch is good for this purpose. Actually, there are wristwatches of different water resistance: while some of them can withstand close contact with water, other timepiece break down after a few minutes after being in water. Most water-resistant timepieces can withstand short contact with water, but such timepieces must not be used for swimming and definitely they should not be used for diving. If you want to be sure whether you can swim or dive with your timekeeper, you should read all its markings. Never swim or dive with a watch with the the marking "water-resistant" 3 ATM (30 m)". There are watches with higher water resistance - to 50m, you ought to remove such a watch if you plan to dive, but such a wristwatch will withstand swimming. Only watches with water-resistance of 10ATM (100 m) and more are designed to dive with. It is really sad, but fake wristwatches that enjoy so fantastic popularity, are not highly water resistant. Only genuine wristwatches, can be used for diving, so a Rolex Perpetual Date carbon copy timepiece is not the nicest choice for a diver. A fake Rolex wristwatch is only a duplicate of a real Rolex timepiece, but it doesn't have all the functions of the original Rolex timepieces. You should know that you will not be able to turn your wristwatch for refund for refund, if the watch was damaged by water, no matter if it is an original wristwatch or if it is from a catalogue of imitations.