Sandpiper said:
Look between the lugs where the band connects, if real there will be a serial number embossed otherwise it's fake!
Correct and probably the most accurate way to identify a genuine/counterfeit Rolex watch is by the Serial and Case Reference Numbers. These special identification numbers are engraved on the side of the case, located between the lugs.
The engraving between the lugs of a genuine Rolex feature very fine lines, which actually catch the light similar to that of a diamond cut edge. However, (some) counterfeits will feature a sandy (acid) etched appearance, also the spacing on these numbers is often too close together. It is worth mentioning that counterfeiters frequently use the SAME numbers on their watches. "R863698" is seen quite often, and is a pretty good sign of a fake.
Look at the head of the winding stem...there should be a Rolex crown on the end of the stem and it should be a crisp looking crown with 3 dots on the bottom of the crown which indicates the "Triplock" Rolex is famous for.
The crystal will have a glass bubble, or "cyclops" attached to the crystal, positioned over the date. Its purpose is to magnify the tiny aperture and does so at 2.5 times magnification.
However, on MOST counterfeit models the date magnification is more like 1.5 times, at best. This may not sound like much of a difference, but when looking at the dates side-by-side it's obvious. The date window should practically "fill up" the cyclops--the fakes don't even come close. It is worth mentioning that some counterfeits are now featuring a new larger font date wheel to give the "illusion" of being magnified at a full 2.5 times.
Probably one of the easiest ways to identify a fake Rolex is by the case-back. Counterfeiters will often use a clear display, or "skeleton" case-back, thus allowing you to view the inner workings of the watch, Rolex does not make such a watch. Engraved case-backs are another easy way to identify counterfeits. Rolex does not engrave the case-back with logos, hallmarks, or designs. Genuine Rolex models will have a "smooth" case-back, and are free of these engravings.
In all my hunting I have found one real Rolex and it was working, turned it in to the local LEOs and after a year they gave it back. You can go to
Rolex serial numbers and check to see when it was made.