1918 Lincoln Cent Planchet Error?

[flyank]

The reverse on this cent has a large jagged deep oval gouge. I thought PMD but the dies obviously were able to strike through the gouge and leave their impression. Is there a more correct name for this type of error? Also note how the upper half of the reverse is somewhat blank. Thank you as always for any opinions.

[diamond]

The flattening at the lower pole of the obverse face and upper pole of the reverse face indicate that this is all post-strike damage.

[flyank]

Thanks Mike, what surprises me though is the fact that the oval reverse gouge (which has depth) has retained the lettering. Wouldn't those letters have been obliterated in the PMD with nothing left in the bottom of the "crater" ?

[diamond]

Evidently a lozenge-shaped chunk of soft material was in the way when the coin was mashed.

[flyank]

Now that is definitely something that I hadn't thought of...a material soft soft enough to preserve the underlying devices...but hard enough to gouge out the copper. Thank you Mike....I NEVER would have put that scenario in play. Once again...this forum and membership are invaluable!