| 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} |
| 125 | DD | .~ Compensation of mechanisms for stabilizing frequency [G04B 17/20] {4} |
| 126 | DD | .~.~ For the effect of variations of temperature (alloys with small expansion coefficient C21C, C22C; adjustment of the regulator dependant on adjustment of the hands subclass 122; depending on the difference in time with a comparison clockwork subclass 509) [G04B 17/22] {3} |
| 129 | | .~.~.~ Composition and manufacture of the material used (composition and manufacture of hairsprings subclass 111; of springs subclass 11; anti-magnetic alloys subclass 380; ferrous alloys C22C; nonferrous alloys C22C, B22F) [G04B 17/22R] |