Position difference calibration in automatic alarm clocks

The testing method is quite simple: first you need to wind the watch all the way, then synchronize the hour, minute and seconds hands of the watch to be tested with a standard time reference. Then you run the watch in a flat position for 24 hours, compare it with the standard time and record the error. By repeating the same process sequentially, you perform and record the travel error test of the watch in the dial down, crown down, crown left and crown up positions separately.
Let's give an example: let's say the static test results are as follows: dial up +20 seconds/day, dial down +20 seconds/day, crown down -5 seconds/day, crown left +25 seconds/day, crown up +10 seconds/day. As a result, the tracking error of the watch in real use is +15 seconds/day.
Based on the example above, it is clear that leaving the watch with the crown down at night helps reduce the accumulated heading error of the watch. However, the watch can serve you better if you properly understand the causes of the watch's error and the error characteristics of your own watch.

Movement and Caliber Performance

Automatic alarm repeating watch (Grand and Small Strike Watch — Clockwatch, Grand et Petite Sonnerie; popularly known as automatic alarm clock). In addition to the minute repeater function, such watches can also automatically chime the time. Automatic repeating watches can usually be freely adjusted between automatic ringing (en passant) and ringing only when the ring button is pressed (on demand). When the user switches to the grand automatic ring (popularly known as 'full set', grand strike, full strike, grande sonnerie), the watch automatically makes sound notifications every hour and every quarter hour. When in the small automatic ring (popularly known as 'half set', small strike, petite sonnerie) position, the watch only rings automatically every full hour. When in silent mode, the watch does not ring automatically; Instead, it produces a ringing sound when the push piece is pressed or the slide bolt is moved, depending on the user's needs.