Physique Pictorial was a beefcake magazine published by and containing photographs by Bob Mizer of the American Model Guild. Early beefcake magazines like this served as disguised gay pornography, outwardly appearing to be health and fitness magazines but were very different to the intended audience.
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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.