How Do You Tell The Difference Between Genuine And Knockoff Rolex Watch?

I get unsolicited emails sometimes offering knockoff Rolex watches. The knockoff Rolex products look essentially identical to the genuine type. Do jewelry stores confiscate fake Rolex & other lucrative brand watch products as required by law? Why can’t USA and other nations where the manufacturers produce genuine watches pressure the particular nations to crack down on producing knockoff for copyright/patent violation?

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