This is the opening title from the 1962-'63 season, with the sponsor I.D. {Kellogg's was the primary sponsor of the show during its original four year run on CBS}, and an "integrated commercial" seen at the end of the show featuring the entire cast {a rarity since no more than three of them usually appeared in these spots!}. Sometimes, after the closing credits, an announcer might add, "See Kellogg's 'THE BEVERLY HILLBILLIES', Wednesday night, over most of these stations...".
Because Joseph Kearns originally received second billing after Jay North during the first three seasons, 'cool'; after his death in early 1962, and Gale Gordon replaced him, he received the same billing.
Best Foods {Skippy} became the series' "alternate sponsor" (with Kellogg's) in the fall of 1960, 'Rollman'. Dennis and most of the cast usually appeared in Skippy's "integrated commercials" as well...