@KbM, I agree with the others that there doesn't appear to be doubling on this coin. One way to add arrows is to a pic is to import the file into a program like paint or powerpoint. You can add the necessary detailing and then re-save the file as a *.jpg. By the way, our own crazyb0 has written a couple primers about errors and other stuff that you might find--consider taking a look at them:
We are happy to check out all of the coins that you post, but part of our mission here at CCF is education and you may find that you get even more enjoyment out of collecting coins when you can readily identify PMD from mint errors on your own.
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"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz
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