looking at all the chips and knowing that 1 person owned them gives better clues.the 1980 chip may have sun or smoke damage. the 82and 03 chips may have been in a ladies change purse bouncing around. wouldn't take long to round the edges ,plus the color looks darker.if you ever count a big jug of change nickels,dimes and quarters your hands get the same way.skinnig alot of wire copper and aluminum same thing. bring um to sept meeting.see you then.