Picture is not an optimal size but the mark is most likely a lamination peel, caused by an internal weakness in the cupronickel alloy. This is a fairly common occurrence and not considered to be an error but it does distract from eye appeal and can slightly devalue a coin. Your coin also suffers from numerous rim dings so that would lower the value even further. Without the damage, your coin would only be worth about $5 in Fine condition.




















