This is a Fort Cheyenne playset manufactured by Ideal toys (circa 1960’s). Ideal was competing with Marx’s popular tin litho “carry-box” Fort Apache playset, and so they decided to create their own vinyl version, a vinyl suitcase / travel box for fun on the go. When the box is opened up, it reveals a vacuformed plastic Indian village on one side (with a tepees and running river) and a fort on the other side. Of course, the set also came with plastic Indian and cavalry figures. As you can see, the graphics on this set are bright and colorful and quite wonderful, a perfect playest to stir the imagination of a little boy.
Okay, when I was a little boy I would have rather played with a Barbie wardrobe suitcase, but that is another story.