The mechanical core provides power through the spring, and the gear group transmits power. This power comes to the "escapement mechanism" to achieve isochronal output, which is the basic timing principle of the mechanical meter. The core part is the so-called "escapement mechanism", which consists of key components such as pendulum, hairspring, escapement fork and escapement wheel. This is the crystallization of the 500-year history of human mechanical timing, a group of very delicate, tiny and efficient mechanical structures.
At present, the oscillation frequency of the escapement mechanism of the mainstream mechanical clocks and watches is 6-8 hertz, that is 21600-28800 VPH. Even if the error of one or two seconds a day (the standard for the manufacturer of the observatory's core), its travel time accuracy has reached 99.99%. Therefore, low frequency is the main factor affecting the travel time accuracy. The relatively inexpensive quartz meter has an astonishing frequency of 32768 hertz, which makes it travel very accurately.
There are many other reasons that affect the travel time accuracy of mechanical meters, such as temperature, humidity, violent vibration, magnetic field, lubricant state, etc. In particular, the magnetic field directly leads to the adhesion of the hairspring, and the mechanical watch will become faster instantaneously. Mechanical clocks and watches are the carriers of force and beauty. Their appreciation value is greater than their practical value. They need not be too strict about the accuracy of travel time.