I think i have seen that book before
Funny, I was thinking the very same thing, but cant recall where or when. Pity about the binder holes, but it is what it is. Interestingly to me, there is an interior ad for books that month including #15 itself. If the colors are correct, then "Planet Comics" would have originally been pink rather than red. But all the copies I've ever seen look like this one.
I think that most people "wish" the cover was red rather than the actual fiction house orange. I think it was planned to be orange. Here is the back of my Rangers 2. It depicts 15 with orange. Notice the Jungle book above Planet, the fiction house bullseye and Jungle title is a deeper orange than the planet and the Rangers. The inks would have been set for the same hue, therefore if the jungle bullseye is reddish then the planet should be reddish, but they are two different colors.
I have also noticed that on several ads that the colors are TOTALLY off. Check out the planet on this as (bottom right). This one shows a yellow background while the actual comic is more of a purple wine color.
Lastly, nice pick ups Flex (thumbs u