It's Post Strike Damage. The date took a really hard hit that has displaced the metal and the ear is just worn smooth. Lots of wear and lots of contact in the last 56 years! Kinda like me, but I'm just a bit older than the coin.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!























