I see what appears to be a grey area southeast of the mintmark. It could be split plating that has exposed the zinc around the MM but it is impossible to be sure from those photos.
If your camera has a MACRO setting (usually indicated by a flower) then turn that on for close up pictures. Outside natural light ought to be sufficient.
BIO is referring to the zinc cent being struck really hard. It "ruptures the skin" of the zinc cent, and some of the coin will "leak". It may also curl some of the skin under the original mint mark to make it look like its an RPM (aka D/D or S/S.
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