Just see the back side of the die. And look for the logo and "made in ... ". by looking at the quality you can also judge. These are some ways through which you can know if it is the original one or fake one.
How Can You Spot A Fake Tag Watch?
Through advertising for
CompuServe began offering
I think some replica watch almost have no difference from real watch . No matter in appearance or size . But the only difference is it's function .