I have always been of a mind that significant changes warrant their own listings. Signatures being moved from the front to the back of a note would be a significant change in my mind. I am guessing the wrinkle is that there is a note with the signatures on either side, and so the one side matches a variety of another year that has the signatures on one side?
In this case, I would have two listings, and I would link these two listings, but have them seperated by Pick number which is in effect, seperating by year.
Benjamin
Library Media Specialist, columnist, collector, and gardener...