| 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} |
| 135 | DD | .~ Component parts or constructional details, e.g., collet, stud, etc. [G04B 17/32] {2} |
| 138 | | .~.~ Means for locking the spring in a stationary position, e.g., using a block, etc. [G04B 17/32C] |