| 352 / | HD | OPTICS: MOTION PICTURES |
| 1 | DF | WITH SOUND ACCOMPANIMENT {12} |
| 31 | DF | .~ Separate picture and sound carrier systems {1} |
| 32 | DF | .~.~ Picture strip and groove-type sound disc or cylinder {1} |
| 33 | ![]() | .~.~.~ Interconnecting drive permits relative position adjustment |