What are these 5x7 1960's baseball cards?

Hey Everyone-
Transplant from the coin forum with some questions. My uncle has these "cards", they are about 5x7 on paper, not thick cards. looks like they were wrapped around gum. The reverse is completely blank. He has about 30. Just thought I would ask if they are anything special and if they have any value at all. The design is familiar to me (1969)? but really I have not looked at my cards in a while. My guess is these are fun and collectible but not real valuable.
Any help or opinions appreciated.



Transplant from the coin forum with some questions. My uncle has these "cards", they are about 5x7 on paper, not thick cards. looks like they were wrapped around gum. The reverse is completely blank. He has about 30. Just thought I would ask if they are anything special and if they have any value at all. The design is familiar to me (1969)? but really I have not looked at my cards in a while. My guess is these are fun and collectible but not real valuable.
Any help or opinions appreciated.




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Comments
It's a 32 pinup set issued by Topps, as inserts in the regular card packs in 1967 (that's why they are folded into fourths).
They do have some value. According to the 2007 Standard Catalog of Baseball Cards, the set is worth about $65 in excellent condition, with Mays and Aaron being worth ~$5 each, and Mantle ~$14.
Steve
I don't know how prices have fared in the past 3 years, but I'd think they've remained roughly stable.
Steve