IMO it's not a RPM. It's a plating issue but I don't remember what it's called. Ask @furryfrog02; @JCro57; @paddyman98; @cpm9ball; or one of the other error coin experts. On another post you asked about sites where you could learn about Lincoln cent errors. If you didn't get the info, here's a few: http://www.lincolncentsonline.com/ http://varietyvista.com/ http://lincolncentresource.com/ http://doubleddie.com/ Happy hunting!
Thank you all for answering.. There is so much to learn that sometimes it's overwhelming, but I am enjoying every bit of it! Can't wait for the show in Jan!