Posted By:
runscottPete pointed out to me two years ago that we (meaning me and some others) were using the word "proof" too liberally. Most items that people call "proofs" are actually printers scrap, this included.
The intriguing part is trying to guess why the original sheet didn't make it to production (didn't get printed on the back and cut). Could be for a variety of reasons - if you held this card next to a production version you might find a mistake, but you might not.
Pete - any ideas as to why we find cards that are blank-backed but otherwise look perfect?