Just from the environment it was sitting in. I've seen plenty of nickles just like that. Stick one in an ashtray for a while, let the crud set in and then rinse it off. You'll have that. Same with one that's been sitting in gravel.
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