Hello, I was looking at this 1962 hanging 2 Canadian cent with a very slightly doubled 6 on the reverse when I flipped the coin over and glanced at Mary Gillick's initials to see if they were there and saw markings I have never seen before on any similar coin. My first thought was it has something to do with denticles, but that doesn't fit. I have no idea what they may be and what might have caused them, Has anyone seen these before or anything similar. Those are the best photos I can take with my limited equipment. Any suggestions or comments would be very much appreciated. Thank you. Dave