Here's another set of Planet of the Apes covers from Marvel's 1970s magazine. These covers are different from the last set--not related to the movie adaptations. They showcase Marvel's original apes stories.
Planet of the Apes #14: Killer Gorillas on a Manhunt! I love how the gorilla in the center is aiming the rifle right at the viewer. The orange hue shining against their uniforms and the water is really cool.
Planet of the Apes #3: Jason and Alexander travel to the Forbidden Zone. A very popular vacation destination on the world of the Apes.
Planet of the Apes #4: Jason and Alexander meet Gunpowder Julius and his band of coonskin cap wearin' Apes! This was one of the wildest inventions of Doug Moench and Mike Ploog.
Planet of the Apes #26: Gorillas mashed up with Viking armor, on a conquering cruise! This wasn't the only sea-bound Apes adventure. Doug Moench and Tom Sutton also did a series of "city-ship" Apes stories that were wildly imaginative. Nuff said.
Update: While I received these POTA covers from a different source, I learned that they originated from Hunter's Planet of the Apes Archive. Dave Ballard wrote to alert me--he was also the person who retouched the covers. Check out that website, they've got some unpublished Doug Moench scripts and many other cool Ape-related things.