A movie distributor is appealing the R rating assigned to the Holocaust documentary “A Film Unfinished.”

Oscilloscope Laboratories said Aug. 3 that it would appeal the rating by the Classification and Rating Administration for the documentary, which explores a Nazi propaganda film taken in the Warsaw Ghetto in 1942.

With an R rating, viewers under the age of 17 must be accompanied by an adult. The rating board explained its decision, saying the movie contained “disturbing images of Holocaust atrocities, including graphic nudity.”

“This is too important of a historical document to ban from classrooms,” Adam Yauch, an owner of Oscilloscope and a former Beastie Boy, said in a statement.

Yael Hersonski’s documentary was shown at this year’s San Francisco Jewish Film Festival and  is set to open nationally in the fall.  — jta