English: Lobby card from the 1942 Frank Buck Film Jacare.
There doesn't appear to be a copyright notice on either copy of the card I've viewed. However, both files are relatively small and either/both may have been cropped. Have licensed this as copyright not renewed to be certain of a proper license for the card.
A search for copyright renewal for the film and for artwork was done for the years 1969 and 1970. There were no listings in either category for Jacare or Mayfair Productions. There's no evidence that copyright continues to be claimed on this material.
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.