No mark is Philly. I love the color but it's oxidation and just a nickel.
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Pretty cool black 1964 Jefferson nickle. I don't see a mint mark
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
Similar Appraisals
Buffalo nickels ranging from 1928 to 1938
50 cents to a dollar.
1964 Nickel mint mark D
20 cents
2017 Jefferson nickel
It hasn't risen in value.