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LIBERTY looks flattened out by circ wear... EPU looks like plating issues... There are platining issues and die wear on the date but I am not sure about what is called grease mold doubling??? Here is the definition from our Glossary -
Grease Mold Doubling (Stiff Die Fill Raised Design Element Doubling):error-ref.com‘s term for a recently discovered form of doubling being found on cents from the mid to late 1990s, affecting the terminal digit of the date. In this term, the word “mold” is used as in “jello mold,” not as in “black mold,” or fungus. Presumably, a greasy/gunky film covering the die surface can become hard enough from the striking process that it forms a solid mold of the design element. If this solid mold of gunk begins to shift into the field from its original position, and since it is in the same shape as that portion of the die, it can create a raised design element in an offset position. Of course, since this mold will be somewhat smashed during the strike, the slightly raised element will be larger that the original design element. In addition to the link at the beginning of the entry, please also see this article by Mike Diamond for more information. The images below were donated by jallengomez and Joel.
Make sure you check out the error ref link also... Hopefully some of the pros will chime in!!!
Jim (A.K.A. Elmer Fudd) Be verwy verwy quiet... I'm hunting coins!!! Good Hunting!!!
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Be verwy verwy quiet... I'm hunting coins!!! 
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