Sam, you can see that closing sequence, minus the Winston ad and flashing billboard, in Flintstones reruns on Boomerang.Sudden Sam wrote:
i don't recall this ending credit sequence.
I think the closing song was only added to the later episodes.
Somewhere along the line, cigarette advertising was banned on TV (I think it happened in 1968; I may be off by a few years, but it was around that time), so I think the Winston references had to be taken off for reruns.