Looking over the Checklist, it got me thinking of some "true" wrapper/pack variations that a lot of collectors don't know about or have overlooked. Are you guys familiar with these...
"Bathroom Buddies" - 4 stickers / 5 stickers (one was the test version)
"Flying Things" 1970 Edition - Yellow wings / Green wings (Display Boxes also have this variation)
"Flying Things" 1971 - 10 cent orange / 10 cent purple / 15 cent orange (might be Australian)
"Funny Monsters" 1959 - 1 cent non-repeating / 1 cent repeating
"Gremlins" 1984 - With Sticker / Without Sticker (The wrappers with no stickers were released in parts of the country where the Gremlins cereal that had the Topps stickers inside were also released.)
"Jaws 2" 1978 - Extra! / No Extra! (Someone complained they didn't get their "extra" sticker in the pack!)
"Groovy Stick-Ons" 1969 - 5 cent / 10 cent
"Wacky Ads" 1969 - 5 cent / 10 cent (5 cent may be test)
"Wheels" 1954/1955 - 1 cent 1954 / 1 cent 1955 (1955 held rare high numbers! - I own the 1955 wrapper and it may be the only one that has survived)
I know there are lots more, but I thought this was a good start.