| 84 / | HD | MUSIC |
| 1 | DF | INSTRUMENTS {9} |
| * | DD | .~ General features {7} |
| 423 R | | .~.~ Keyboards {12} |
| 424 | DF | .~.~.~> Plurality of manuals |
| 425 | DF | .~.~.~> Auxiliary {1} |
| 427 | DF | .~.~.~> Plurality of touch plates {1} |
| 429 | DF | .~.~.~> Curved front |
| 430 | DF | .~.~.~> Key bottoms {1} |
| 432 | DF | .~.~.~> Key frames adjustable |
| 433 | DF | .~.~.~> Keys {4} |
| 438 | DF | .~.~.~> Manufacturing processes |
| 439 | DF | .~.~.~> Touch regulators {1} |
| 441 | DF | .~.~.~> Key holders |
| 423 A | DF | .~.~.~> Uniform |
| 423 B | DF | .~.~.~> Button type |