It looks like the copper layer is showing through on parts of the reverse. I have seen this on a few Jefferson nickels but not on Kennedy's On the nickels, they will completely turn green where the copper is exposed. It would be interesting if it limited to a particular year but I doubt it.
It looks like a strong matte gray color kind of like the Robert f Kennedy that came out in 98 and the edge of coin on obverse side is not like all the other 97s I have
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Coin Community assumes no liability for errors. Copyright 2005 - 2026 Coin Community Family- all rights reserved worldwide. Use of any images or content on this website without prior written permission of Coin Community or the original lender is strictly prohibited. Contact Us | Advertise Here | Privacy Policy / Terms of Use