I saw some lines at the hair of the obverse of this 1921 Peace dollar. They are all parallel. Are these lines scratches, cleaning or die polish lines? Similar, I see some parallel lines on this 1876 S Trade dollar. These lines are not as obvious as my 1921 Peace dollar above. What are these lines? Cleaning or die polish related? If I send these 2 coins to grading companies like NGC, will they come back as damaged? I know my trade dollar has chop marks, so I already expect a detail grade if I send this coin. I just wonder if the trade dollar is cleaned or not. How about the 1921 Peace Dollar?