Abstract
The CAL. 9T has been developed as a kinetic watch with a self-winding power source and chronograph functions. The chronograph functions in the CAL. 9T have been realized through a combination of: ・High-output power generation for chronographs' large power consumption needs, and ・Stepping motor driver for hand motion and lever-based reset mechanism for chronograph functions. This essay describes this mechanism and the electronic control system.
