While I can't confirm or deny whether or not this vet medicine was effective, I can attest that the poster measures 14" high by 11" wide. There are 4 unobtrusive edge tears measuring approx. 1/2 inch, a minor crimp by the letter 'r' in sulphur, and minor losses to three corners, all commensurate with age and minimal use. The sign is made of a quality heavy paper sporting a small brass grommet in the top center for hanging. Framing will further enhance this interesting piece of vintage advertising.
Veterinary signs of any type are quite scarce! Wonderful patina!