I have no idea how pawn shops can authenticate on the spot. For the newb, replicas are near impossible to spot and those rated "super replica" in a popular "homage" forum would take an expert to know. Anyways, I am still trying to authenticate my latest buy. I have not found anything in my watch that says fake. Some days I think mine is good but other days I have my doubts. I will eventually have a look at the movement but even those are being decorated to look genuine. Interestingly, the "homage" forums know more about year to year production changes than legit sites.