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The difference between automatic chain feeding movement and manual chain feeding movement lies in the different chain feeding mode. The manual chain wristwatch needs manual chain every day, while the automatic chain wristwatch has internal friction, which uses the movement of the wrist to automatically chain. Automatic chain wristwatches usually have at least 38 hours of power storage. Even without the watch, they can still have enough energy storage to maintain stable operation.
Automatic mechanical watches rely on the swing and up rotation of the arm during daily wear to supplement the spring and store energy to make it work. When the wearing time is less than 8 hours or the arm swing is less, the watch will stop when the energy is insufficient. The watch has not been worn for a long time. At the initial stage, about 30 turns on the watch must be manually used as energy reserve to obtain better travel time performance. There is an error in the travel time of the mechanical watch, and the error is calculated by the daily error (- 40 ~ + 75 / day). It cannot be accumulated. It is recommended to adjust the watch once a week according to the standard time
The waterproof function of the watch cannot be guaranteed to remain unchanged forever. This may be affected by the aging of waterproof rubber ring or accidental impact on waterproof components such as crown, button and crystal mirror. As specified in the maintenance instructions, we recommend that you send the watch to a SANDEX approved maintenance center once a year to check its waterproof function.
SANDEX uses a slow date change system to clearly display the date change process around midnight to avoid confusion. The calendar window can still display the date of the day until 11:30 midnight. By midnight, the date of the day can still be read completely through the bottom of the calendar window, and the new date will appear at the top of the calendar window. Then, the new date moves down to the window, and the date of the previous day will gradually disappear. This process will be completed between 1 a.m. and 3 a.m. Manual date adjustment should be avoided between 8 p.m. and 2 a.m. the next day, because automatic date change is in progress during this period.
Life waterproof can only prevent the occasional absorption of water splashed by rain. Do not wash your face, shower, or swim.
Like other highly precise instruments, watches need regular maintenance to ensure perfect operation. Although we cannot explain the content of regular maintenance here, it depends entirely on the style, climate and maintenance of the wearer. According to the use of watches, the period of regular maintenance is usually every 4 to 5 years.
Do not touch the watch with solvents, mercury, cosmetics spray, or camphor, otherwise the watch strap, watchcase and so on will fade, deteriorate, or damage. Do not go near the magnetic items. Although there are antimagnetic devices, they are often near magnetic objects, which will make them not allowed to travel.
