I had a kid come by to sell me kitchen cutlery. His coup de grâce was a brute pair of scissors. His demonstration was cutting a coin in two with his scissors (yeah, I bought them)..... I believe your dime has been the victim of a cutting tool.
darn!! I'm brand new at this. It seems to me if you were cutting the line would be straighter. It seems the part through his mouth caused the crack to go the other way. But I am a novice. Thank you for the information.
Two separate straight cuts, one at a slightly different angle than the other. We were all new once, hang around and read all the posts, you'll be learning in no time. It never ends though, I've been doing it over 50 years and still learn new things all the time here!