1. If the quartz watch suddenly found to be slow is likely to be caused by insufficient battery energy, you can send the watch to a special service point to test the power. 2 mechanical watch according to the movement of the model and manufacturing quality vary, 30 microsecond error per day is a normal range. 3. Self-winding mechanical watches small amount of exercise may also result in insufficient power storage, you can manually replenish the power chain, and then observe whether to continue the phenomenon of speed. 4. Internal parts worn or movement of the lack of oil may cause the watch error when walking, this time need to be sent to a professional maintenance point for maintenance services. 5) Abnormal use (see the watch maintenance and daily use precautions), the watch error occurs when walking, the watch should be sent to the designated maintenance point, please check and adjust professionals to restore the watch within the normal error range. How to use the mechanical watch correctly 1. Manual winding watch requires manual winding every day, while the self-winding watch has an internal automatic hammer, the use of wrist movement to automatically winding. Self-winding watches usually have 40 hours of power reserve. 2. In the case of the watch is not worn or the amount of activity is low, the self-winding watch power reserve will drop, the manual winding method to supplement its power reserve energy. 3. No manual winding or self-winding mechanical watch, if you are not often used or not wearing for a long time, but also need to watch the chain on a regular basis so that the movement of the regular rotation of the watch movement to maintain the good functioning. Poly fashion watch mall Recommended reading: Quartz watch is good or mechanical watch good ladies watch brand list the world's top ten watch brand watch list Ji'An ZhongXiang Natural Plants Co.,Ltd. , https://www.zxnaturaloils.com