I had always assumed that there were only 5 different 1977 star wars pack variations. Today I learned that there are two different series 5 wrappers and a number of series 1 "fun packs" with 2, 3 and 4 cards each. Does anybody know anything more about these "fun pack" variations and is there any way to distinguish them except by pack thickness? See PSA link below: PSA Star Wars wax pack population link