My grandfather had coins worn on one side more than the other. He gave me the coins before he died. I asked him why some were like this. He told me he had had them for a long long time. He traveled a lot and carried everything he owned in his vehicle. He said he thought the coins that were worn only on the one side were on the top of the container he kept them in. Pill bottle sized containers with different sized coins stacked in with a lot of room to wiggle. A lot of the middle coins were completely smooth. The top coin was smooth on the "bottom" but the "top" looked ok. He drove back and forth from Arkansas to Washington State to pick apples for many many years. He just knew the coins were old and worth keeping but didn't think about the damage being slowly done. Back in the 30s the drive from Arkansas to Washington was a lot of gravel and dirt. A LOT of bumps. He kept everything he owned with him. These coins were some of them. So, I guess the moral to the story is, you never know why some coins look the way they do. Yes, Grandad ruined some nice coins inadvertently, but such is the life of a coin. I have these coins somewhere but I can't find them at the moment.