| 968 / | HD | HOROLOGY |
| 446 | DD | ELECTROMECHANICAL CLOCKS OR WATCHES INDEPENDENT OF OTHER TIMEPIECES AND IN WHICH THE MOVEMENT IS MAINTAINED BY ELECTRIC MEANS (synchronization subclass 506) [G04C 3/00] {8} |
| 466 | | .~ Wherein movement is regulated by a balance (construction thereof subclass 110) [G04C 3/04] {2} |
| 467 | DD | .~.~> Using mechanical coupling [G04C 3/04B] {2} |
| 470 | DD | .~.~> Using electromagnetic coupling between electric power source and balance [G04C 3/06] {5} |