This is the poster that goes with the 1960s movie The Beast of Yucca Flats. It’s not a particularly good movie but the poster is okay. If you want to learn more about the movie, I have written a review and published it on another page of this site. You can watch the full movie on the same page: Public Domain Movie: The Beast of Yucca Flats (1961)
If you click on the picture of the poster you will be able to view the image full-size.