BOS watches, a young and fashion brand origin from Germany. Founded by Angela•Feng • baosi (Angela Von Bos) in 1988 at a Germany small town called Glashutte (Glash • TTE).BOS watches’s brand building history started by then. After more than 20 years development, with its creative design on appearance, breaking the traditional mature classic watches for the mainstream situation, open up new classic,fashion style and became Germany's well-known brand and private customized high-end watches. Welcome to achieve BOS watch challenge if your eyes farsighted and looking for perfect. What can I do when the watch stop? Fully winding up spring need be turn the crown clockwise 20-40 rounds to start the watch and give it some reserve power， Self-winding automatic movement watch needs to wear every day (for about 8 to 12 hours a day)， The Automatic Wrist Watch is wound by the motion of the wearer's arm，that is wound by wrist morements thanks to the rotor， this device winds the watch's mainspring automatically using the natural motions of the wrist, with a rotating-weight mechanism. If an automatic watch is not worn for a day or two, Or the natural movement of the wrist is very small,it will wind down and need to be Supplementary winding by hand to get it started again,turning a Crown winding attached to a ratchet which twists the mainspring tighter,Energy is stored in the mainspring manually by winding it up. A separate set of gears called the keyless work winds the mainspring when the crown is rotated, and when the crown is pulled out a short distance allow the hands to be turned to set the watch.
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