This impression has two small color lithographs, printed as proofs, on the verso. One, or both, might be by Millard Sheets who also worked with Kistler.
In 1967, Ballantine Books published a special school edition of Ray Bradbury's "Fahrenheit 451" that eliminated two minor incidents and words such as 'hell', 'damn' and 'abortion'. Ironically, the censorship of this book about censorship and expurgation was unknown to Bradbury. He eventually found out and demanded that the full text be reinstated. Some editions now have a 'coda' penned by Bradbury: 'I will not go gently onto a shelf, degutted, to become a non-book.' The Hypodermic Hound on display is by the artist Joseph Mugnaini.
The image was included in this second printing.