Figuring out what is and what is not an error is harder than trying to understand a woman’s mind. Ok that is a gross exaggeration. After nearly 45 years with my wife I’m no closer to understanding her than when I started. But I’m still puzzled over what is an error, post mint damage, grease filled dies, well, you know. So tonight I’m perusing the mint mark on this 1879 Morgan dollar and I’m not sure what has happened to the mint mark. So please broaden my understanding of this...whatever. Many thanks and forgive the pictures.