Note the overall size of the mint mark. That is normal. The edges you are looking at are contact marks from circulation. You might take a look for the listed one on CONECA for that year. (2) Then you can see why they are RPMs. http://www.varietyvista.com/02b%20L...%201975D.htm Always good to check for listings to see if there are any known a certain year and what they look like.
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