The watermark is often a stability characteristic identified on authentic bills. Based upon when the banknote was manufactured, the watermark can be an oval or simply a replica from the banknote’s deal with. Also, consider tearing the bill in 50 %; if it rips very easily, then it’s possibly copyright. https://rylandzxsw.bloggosite.com/42263762/copyright-us-coins-for-sale-an-overview