Here's one of those postcard booklets with the flip-down-two-sided cards. This one was part of the collection Fred Harvey sold. As usual, the illustrator is not given any credit. I love the front cover of the Hopi Pueblo and the back of the Navajo sheepherder in Monument Valley. Both really lovely illustrations in Southwestern colors. Each would make a really nice framed print. I wonder if these paintings even exist anymore? As you'll notice on the Navajo one there is the slit where the flap is to slip in to enclose the card booklet.
Click on image to see it larger.
The shot of the Grand Canyon is also quite interesting. A black and white shot that had color tinting applied, most likely as overlays on the mechanical, it gives the Canyon a sort of candy colored rainbow look.
This dates most likely to the mid-to-late 1940s.