DIFF Subgroup
G04B 18/06 by setting the collet or the stud of a hairspring
Introduced: January 1980
Full Title
Mechanisms for setting frequency > Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat > by setting the collet or the stud of a hairspring
No child classifications to compare. This is a leaf node in both IPC and CPC.