That "3" is a counterstamp. Someone stamped the coin with a punch after it left the mint, which left an incuse 3 on the coin. I'd guess that it was done at an earlier point of its life, considering that the 3 is also very worn (parts of it almost blending in with the field). It still retains its silver value.
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