I am not into paper money. But as a coin can get grease on a die this appears to be lint on the roller (not sure if that is correct term). It does look like it is from the mint in that condition. It will be interesting to see what some of the experts say as far as if it increases value (which sadly I doubt).
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