This looks more like devices were polished away. On a partial Grease Fill the devices would be wider. On this coin the devices are showing the tops of the devices, that if it were a grease issue would not be showing.
Not an error. I'm leaning toward a die polishing matter. Also makes an appearance in the 'IGWT' characters closest to the rim. Thinking about it, this is not terribly uncommon in dimes from the late '90s through the 2000s--at least in my experience. Oh the fun.
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