Assembles, inspects, and adjusts watch hairspring and balance assemblies, using watchmaker's tools: Attaches hairspring to collet and stud [COLLETER (clock & watch) 715.
684-066; STUDDER, HAIRSPRING (clock & watch) 715.684-186], and assembles parts of hairspring and balance, using punch, staking tool, tweezers, and other watchmaker's tools. Overcoils spring [OVERCOILER (clock & watch) 715.684-150], and trues spring [HAIRSPRING TRUER (clock & watch) 715.381-058]. Poises balance wheel. Locates vibrating point [HAIRSPRING VIBRATOR (clock & watch) 715.381-062]. Inspects and adjusts hairspring and balance assembly [INSPECTOR HAIRSPRING (clock & watch) I 715.381-066].