I stumbled upon this quite by accident while doing an unrelated internet search. Somehow I managed to miss this when I was growing up. Kellogg's apparently used this "Big Otis" character to sell their OKs cereal around 1960.
Otis.jpg
That got me curious and I found this on Youtube: http://www.youtube.com/watch?v=0ZgqFFiNVn0
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