What you see on this coin is damage, it is called Zinc rot,has become quite common on the modern Zincolns curtsy of US Mint's high quality coinage.It is not an error, it started after it left the mint and it will eventually get worst.
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