From 1975: More Palitoy goodness... PLANET OF THE APES and STAR TREK action figures.
This striking ad appeared in THE AVENGERS AND THE SAVAGE SWORD OF CONAN (phew!) issue 95, 12 July 1975.
This was the first combined issue, Savage Sword having floundered after only eighteen issues.
The two franchises are currently crossing over again, courtesy of a new limited series from IDW and Boom.