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I don't believe that pressing these banknotes would have increased their value.
-Pressing a note
decreases the value. There's no questions or debate about that. The OP is a query whether it was pressed or washed. It is very tough to tell by photos.
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I would think that someone with notes that were AU would do this to make them look MS.
MS or Mint State is coin talk. No banknote goes near a mint. It is either Gem uncirculated or lower degrees of uncirculated (like AU or Unc60).
But you're right & smelling is a good strategy. Sadly, many people used to flatten, wash &/or iron older banknotes. They did this so much so that it is better to be suspicious than not.
The good news is that it wasn't uncommon for banknotes to have a little ink spill over in the margins during production as seen on the top of the $2 (reverse) plus folds are visible.
The bad news is that 2 white vertical creases appear in front of the $5. These & the mid-horizontal crease show design has been worn off but the note appears clean otherwise. I would suggest it has been washed (& likely pressed) by those 2 telltale signs. It may have entered circulation again or been folded afterwards. The $2 looks slightly more promising but it still looks exceptionally circulated (so many wrinkles) yet almost too clean (the under-print is missing telltale signs of circulation). I would have to see them both to be sure but they both look a bit suspicious.