US PATENT SUBCLASS 968 / 124
.~.~ By setting the collet or the stub of the hairspring [G04B 17/18]


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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  DD  .~ Adjusting the beat of the pendulum, balance or the like (adjusting the frequency subclass 114) [G04B 17/16] {1}
124.~.~ By setting the collet or the stub of the hairspring [G04B 17/18]