Both obverse and reverse of this Lincoln Cent coin were struck through with some foreign unknown matter maybe grease. Certified as a mint error by NGC. They do not give a grade on these errors. Although it is in uncirculated red condition, there is not much detail to grade. Similar to a die adjustment. First 2 numerals of the date can be made out (20). Most outer lettering on both sides are either totally occluded or faint. NGC Mint Error