| 968 / | HD | HOROLOGY |
| 103 | DD | MECHANISMS FOR STABILIZING FREQUENCY (magnetic subclass 497; in striking mechanisms subclass 224; stopping and regulating of the running subclass 234; electrical and thermoelectric regulating mechanisms subclass 496) [G04B 17/00] {8} |
| 123 | | .~ Adjusting the beat of the pendulum, balance or the like (adjusting the frequency subclass 114) [G04B 17/16] {1} |
| 124 | DD | .~.~> By setting the collet or the stub of the hairspring [G04B 17/18] |