2011 Grant Presidential Dollar
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In my opinion, If they all look similar, it could very well been a slightly clipped planchet.
It could have been a faulty metal alloy mix.
If the issue occurred in the same area on each coin, it could have been an issue when adding the inscription along the rim.
I could go on and on, its just tough to know for certain what happened to them to tell you the honest truth. Again check for patterns, Line up all the affected one on top of each other and see if it tells you anything. Logic rules over assumptions.
Three helpful posts:
How to take better photos with a Cellphone:
https://board.conecaonline.org/forum...th-a-cellphone
RPM or DDO question? Help us help YOU:
https://board.conecaonline.org/forum...lp-us-help-you
What Forum to post your coin questions:
https://board.conecaonline.org/forum...t-forum-to-use
Gary Kozera
Website: https://MintErrors.org
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