Today I noticed the crappy printing on a CK series $5 note. If anyone has one starting with CK can you see if it is similar? I didn't have another in the same range to compare it against so checked against a B prefixed note and the quality on that note and all others I have is much better. Holding it up to the light makes the ink problem more obvious: And some comparisons:
Fading is common with age and those marks are pmd (post mint damage) caused by teller machines biting the notes. Sorry no extra value here, keep on looking, you never know when you will find a good error.