| 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} |
| 114 | DD | .~ Setting the frequency [G04B 17/12] {3} |
| 117 | DD | .~.~ Adjustment devices [G04B 17/14] {5} |
| 121 | | .~.~.~ Locking the hairspring in the regulator key (hairsprings subclass 111; locking the mainspring on the axle subclass 14) [G04B 17/14F] |