J84 Postage Due Ink Smear

Would you consider this an uncommon variety (lower right stamp, the "1" in the denomination "10")?



Here's a close up:



Would it just be considered a "freak" because of the overinking?

I don't see any indication of a problem with the wipers which I would expect to see if it was from over inking. Since the rest of the unprinted area looks pretty clean I would suspect it to be a damaged transfer with a small ding.

Thanks. Actually, it's an O.G., N.H. block of stamps, even though it has a P.O. handstamp cancel. Apparently this post office marked sheets upon sheets of these stamps, presumably to document postage due payments, and later they were broken up into blocks of 4 as shown in my scan.

Here's another example (again, lower right of the block) that may be more common, except that the stamp looks as if it were "oversprayed" (?) with ink:



Another sectional close up:

Appears to look like paper dust on the plate. By looking at the scan, it seems like the left side is clean and progressively gets worse going to the right side.