So I'm not sure what to call this. It's not just a "flipper" because it reads the exact same upside down as it does right side up. I'm mostly into coins but my wife came across this and I told her I would ask for her if this is a sought after type of serial number.
That kind of serial number is called a rotator, and it does command a premium to the right person. Of course it would be better if the note was in better shape as well.
It also qualifies for a PMG fancy serial pedigree. Here's what PMG has to say about it
Quote: A serial number that doesn't change if read upside down. The only numbers that can be used are: 0s, 1s, 6s, 8s, and 9s.
Quote: That kind of serial number is called a rotator, and it does command a premium to the right person. Of course it would be better if the note was in better shape as well.
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