Hello, ANA. I need some help.I am going through a collection from a friend of mine and have located what I believe to be a 1916-D Mercury dime. The edges are worn smooth, but under magnification I caught what I believe to be a "D" Mint-mark. I hope you can help me know if it is real or not, like die markers or things like that. P.S. Here are some pictures of the coin in question:P.S.S. I used some filters to enhance its appearance, to make the high points and things stand out, but I included a picture of the unfiltered dime from afar as well, along with an up-close unfiltered one as well.