English: Black-and-white publicity photo of Duncan Renaldo (April 23, 1904–September 3, 1980) as The Cisco Kid and his horse, Diablo.
This photo was distributed at personal appearances over many years. Because the Circus Store photo has a date and I couldn't view the back of it, a copyright search was done at copyright.gov for any possible renewals. There were no results for B & I and no renewal results for "Cisco Kid". Although it appears there was no copyright on the photo, a non-renewal license appears to be the best choice.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.