Warner Bros. Sound Editor, 1939. He has a Moviola to play the film and its optical soundtracks independently, so he can organize pieces of cut sound to be mixed later. Notice that he’s holding a length of film and a length of optical track together at once. He has china markers (a.k.a. grease pencils), scissors, splicing equipment, and blooping ink. He is obviously posing for the studio photographer, but this is a pretty good look inside an old-school cutting room. - Bison Archives and HollywoodHistoricPhotos.com