I know this is a difficult question, but I was wondering what you think the coin is (or was) that has/had the most chance of getting worn easily? This can be from all nationalities or years. Take in consideration the amount of use the coin recieves or had recieved, the design and materials.
What about buffalo's with the dates imparticular. I am guessing this might come down to nickels just because of the material. Or possibly chocolate coinage.