Thin watches, worn on the wrist, are light and beautiful, and because of the thin core, its structure, raw materials, manufacturing process and other requirements are also higher than that of thick watch parts to be fine, therefore, the selling price is also higher. But things are always divided into two, thin watches also have its many shortcomings. For example:
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(1) thin watch upper and lower two layers of plywood is more general, watch thin, axis hole (especially total is the bar axis f hole) is more prone to wear and tear.
(2) gears and gears between the top and bottom of the distance is relatively close, meet the shaft or hole slightly worn, will cause gears and gears rubbing each other.
(3) the second wheel of the tooth shaft rod, minute wheel tube and hour wheel tube three axial distance is also closer, so that the second hand, minute hand and hour hand of the mutual clearance is smaller, easy to make the watch needle rubbing each other.
(4) The number of turns of the case's upper light and the thread of the back cover (referring to the spiral case) is relatively small, and the longer it is used, the threads of the case's upper shell and the back cover are prone to produce the phenomenon of "slippery teeth".
Therefore, the fall in the watch is not necessarily better than the thick watch.