@via, first welcome to CCF. Second, while I agree that there is a huge amount of damage to this coin, it does appear as though the mintmark was filled it when the coin was struck. This is due to the die post which forms the center of this letter breaking off at some point. While not an error per se, it is a die event. Examples of this are quite common and don't add value, but I though that it was still worth mentioning.
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