179663 ⎘
Measuring, counting, calibrating, testing or regulating apparatus Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
Sub-classes:Self-adjustable horological oscillator
#2Method for adjusting the operating frequency of an electronic watch
#3Packaging box for timepieces device for testing and/or timing a timepiece
#4Device for measuring the accuracy of a mechanical watch