Land of the Giants
The Land Of the Giants trading card set was released in 1968 to coincide with the debut of the Irwin Allen sci-fi TV show. However, this card set differs from others of its era in that it was a test set, and thus not widely distributed. There were 55 cards and no stickers in this set.
Card fronts depicted a color scene from the show surrounded by a white border; superimposed over the photo was a wide, stylized book shape that held the card title and a brief sentence narrating the action, as well as a small version of the show's logo.
Card backs vary; #'s 1-44 contained a comic strip-like ongoing story, with a caption at the bottom left telling kids to see the next card to get the rest of the story; cards #45-54 had puzzle pieces, and card #55 held a checklist.
One indication that this was a test issue (besides its scarcity) is the fact that the only wrappers found for the set appear to be a plain wax-paper wrapper with a sticker attached - meaning the company didn't quite want to invent in printing wrappers quite yet.
Note: There also exists a British version of this card set, printed by A&BC (aka British Topps), that is far more common. Like all A&BC variants of American cards, of course, they are a bit smaller in size.
Owing to the fact that the American version of this set is difficult to obtain, it is one of the pricier late-1960's trading card issues.