Found this in a roll today. What caused the lines down the obverse side? There are also lamination errors on the reverse...
The 'lines' are the result of the lamination strip (improper metal mixture) that's been lifted off the surface of the coin. It's rough because that area was not struck with a die; the metal that has 'peeled' off the struck coin - the popular term used to be 'peeled lamination'. Now they're just called, in most cases, Laminations. Some will say the proper term is Delamination, but like 'clipped planchet' ( a misnomer if there every was) I used to older term that's been in use for well over 60++ years.