I must soon honour my promise to offer definitions of Unc-60,63 and 65 and have the debate we are having in pieces at present.
For the case in question we would have to see the note to know if there really are just a few light counting creases or really heavy, disfiguring counting creases.
For years, and in the future, I sell ( AND BUY ) pre-1980 issues with a few counting creases as UNC. The question of what is AS ISSUED is a fair one. From 1935-1950's minimum, you have to assume that issued notes had counting creases. Issued is when they hit the public. What the heck is issued if not in the public hands - in the out-feed table of the press ? Realistically, as noted several times in this topic, a true perfect note without counting creases is scarce for sure, rare in many issues. Those are UNC-65's. The typical issued note with light counting creases, left and/or right is an UNC -60. More on all that later !
As to the centre fold note being AU well there I also disagree with the CPMS ! If it has a center fold of ANY kind it is EF at best, period. When we reviewd those definitions years ago I disagreed then too.
As always, the key to know what you are buying, know how to grade by the standard YOU use. Then you make an informed decision and if you think the offered UNC is really AU and you still want to pay the price, great. At least you KNOW what you are doing.
Gotta tell you, the VAST MAJORITY of collectors can not grade well and most even say so. It scares me when they say "graded by a dealer so it must be right '. I make lots of grading errors so my customers need to look too.
OleDon