Wild. I can't offer a definitive answer, but here's what I'm seeing:
On the obverse, I can clearly see the word CENT, not mirrored, across Liberty's face and rotated about 100 degrees CCW. The marks in the left field and the lower part of the bust look very much like a wreath. Just to play devil's advocate and assume it's a flip-over double strike, the problem here is that CENT is in the upper half of the undertype's design. That would mean the first strike was off-center. The wreath orientation also doesn't make sense with the orientation of CENT for any Half Cent
design up to that point. I would also expect the wreath in the left field to be more flattened if that was the case; it appears to protrude above the field.
I can't make out much on the reverse, but it doesn't look like a bust.
My initial thought is that it's a fake error. It can't be glue or a vise job since the lettering isn't mirrored, but it could possibly have been manipulated by adding metal. The blobs on both sides seem to support that.
Flip-over, off-center multiple strike? Probably not.
Deliberate modification? Seems a lot more likely.
This is an interesting coin. I look forward to hearing from the experts.