Hi. I wanted some input on these two coins. Both have a raised line going through different sections on the different coins. I thought they might be air bubbles, but when I tried to pop them with a toothpick, I broke the toothpick from all the force. I also tried popping them with the round end of a paperclip, but nothing happened(still there). Are they lines from feeder fingers, air pockets, or something else. Thanks for the help!
they look like linear blisters, not all blisters are hollow, some are formed by contaminants in the zinc core..http://www.error-ref.com/?s=linear+plating+blister
