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.
I'm researching "penny packs" and it reminded me of several wrapper variations that exist and most collectors probably don't even know about them. I won't post a bunch today, but will post examples of one particular issue... the 1949 and 1950 Topps "Stop 'n Go" (License Plates) issue.
The 1949 'penny tab' version of "Cross Country Bubble Gum" (aka Stop Go). Notice the 1949 copyright.
Topps halted production of the 1949 small sized cards and issued them again in 1950 at a slightly larger size. "Auto Magic" 1 cent wrappers... these held the 1950 License Plates cards, but why Topps didn't add the "Stop 'n Go" title is a mystery! Top, no "1950"; bottom, with "1950". Also, notice the yellow background goes all the way into the indicia on the "1950" version (except for the '1 STICK').
Now, the 5 cent "Stop 'n Go" wrappers! First, a smaller wrapper with 1/2 oz gum.
Next, a larger version with (I think) 1/2 oz gum. Notice the "WT." ends over the "T" in PLATES.
Last, the larger version with 5/8 oz gum! Notice the "WT." ends over the "E" in PLATES.