The 1962 Post Cereal cards were one of those sets that I believed I finished years ago. I was aware of a few variations in the set, but didn't realize the extent of them. I'm still working on verifying all the Orioles. It seems that most if not all of the cards have variations depending on the brand of cereal they were on.
Here are a couple examples. I was aware of the Jim Gentile (Home listed as either Baltimore or San Lorenzo). I didn't realize that Brooks Robinson had a cropping difference (either more or less of his fingers showing on the bat)
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1962 Post Cereal Orioles checklist -
27 Jim Gentile
28 Marv Breeding
29 Brooks Robinson
30 Ron Hansen
31 Jackie Brandt
32 Dick Williams
33 Gus Triandos
34 Milt Pappas
35 Hoyt Wilhelm
36 Chuck Estrada
Don't confuse these with the Post Canadian cards (fronts in English & French) and much harder to find smaller Jello cards. FYI, for some reason Brooks Robinson wasn't included in the 1962 Jello set, but the other Orioles were.