There are a number of ways a person can tell if a Rolex is genuine, such as noting the quartz movement of the hands. Counterfeit Rolex watches do not have the smooth second hand movement that real Rolex watches have.
Also, genuine Rolex watches do not make sounds when the hands are moving. Winders on Rolex watches are usually elaborately decorated with engravings and ridges, while counterfeit watches often use very plain winders. Fake Rolex watches are generally lighter than real ones, since Rolex watches are made out of high-quality metals. Finally, the small Cyclops lens on a Rolex magnifies the date. This is a difficult process to copy, and many counterfeiters ignore this step in making the watch.