1960 complete Bazooka box with Roberto Clemente. Posted a thread on it here for those interested:
https://www.net54baseball.com/showthread.php?t=286980
To date the only known example!
It was bitter sweet as over the years the search kind of took on a life of its own which ended when I found it!
I have since identified another whale:
Back in the 80's Lew Lipsett ran an ad selling a nice collection of complete 1962 Jell-O boxes including one with Clemente. So I know at least 1 exists/existed. That is my new whale.
Then there are a few - "I don't know if they actually exist" items:
1961 Post cereal complete box with Clemente
1963 Post cereal complete box with Clemente
1962 Post Canadian uncut panel or complete box with Clemente
and the hunt continues!