Preprint paper folds on 1st issue revenues is a fairly interesting area of EFOs to collect. I don't do a whole lot with them, but I have a few. The more dramatic the effect once the folds are unfolded, the greater the premium at retail.
I saw this one and thought it would make a nice addition to my collection, not only because of the dramatic the end result, but because it is on a very tough stamp (R96a, SCV = $3,500).
The one thing keeping it from garnering an insane price is a fairly large repaired tear at bottom left. Still, it makes for an interesting discussion/display piece.
